{"title":"Houdini","description":"","products":[{"product_id":"houdini-30-mm-80-coma-correcting-eyepiece-cc30","title":"Houdini 30 mm 80° Coma-Correcting Eyepiece (CC30)","description":"\u003ch1\u003eHoudini 30 mm 80° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eWith its coma-corrected 80° field, this 30 mm eyepiece delivers the widest fully corrected true field of view available on the market. It is the ultimate wide-field eyepiece for any Newtonian telescope.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e80° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e20 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRead more about \u003c\/span\u003e\u003ca href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" data-jwlink-identifier=\"24821286\" data-jwlink-type=\"page\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv id=\"jw-element-545760045\" data-jw-element-id=\"545760045\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-545768808\" data-jw-element-id=\"545768808\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\" style=\"text-align: start;\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e30mm 80° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e80°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e42.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e8 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e64.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e38 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e580 gr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e2 inch (50.8 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e2 mm above barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565846\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv id=\"jw-element-545759494\" data-jw-element-id=\"545759494\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e30 mm 80° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/astronomyplus.com\/pages\/houdini-warranty\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062029852901,"sku":"HOU-CC30","price":713.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H30-1.png?v=1778882211"},{"product_id":"houdini-20-mm-86-coma-correcting-eyepiece-cc20","title":"Houdini 20 mm 86° Coma-Correcting Eyepiece (CC20)","description":"\u003ch1\u003eHoudini 20 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThe world's first coma-correcting eyepiece for Newtonian telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e20 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRead more about\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" data-jwlink-identifier=\"24821286\" data-jwlink-type=\"page\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"417947655\" id=\"jw-element-417947655\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\" data-jw-element-id=\"417947656\" id=\"jw-element-417947656\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e20mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\" style=\"height: 313.501px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd width=\"50%\" style=\"height: 19.5938px;\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\" style=\"height: 19.5938px;\"\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eApparent field of view\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eField stop\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e30.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eLayout\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e8 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"height: 39.1875px;\"\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd style=\"height: 39.1875px;\"\u003e20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eMax. diameter\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e64 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eBarrel length\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e570 gr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eBarrel\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e2 inch (50.8 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eFocal point\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e2 mm above barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eField flatness\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e\u0026lt; 0.7 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003eEAN\u003c\/td\u003e\n\u003ctd style=\"height: 19.5938px;\"\u003e5419980565808\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e20 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062087688421,"sku":"HOU-CC20","price":570.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H20-1.png?v=1778883390"},{"product_id":"houdini-12-mm-86-coma-correcting-eyepiece-cc12","title":"Houdini 12 mm 86° Coma-Correcting Eyepiece (CC12)","description":"\u003ch1\u003eHoudini 12 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e12 mm 86° coma-correcting eyepiece for Newtonian telescopes.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e19 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRead more about\u003cspan\u003e \u003c\/span\u003e\u003ca data-jwlink-type=\"page\" data-jwlink-identifier=\"24821286\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv id=\"jw-element-545760045\" data-jw-element-id=\"545760045\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-545768808\" data-jw-element-id=\"545768808\" class=\"jw-tree-node jw-element jw-image-text\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\" style=\"text-align: start;\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-417947655\" data-jw-element-id=\"417947655\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"jw-element-417947656\" data-jw-element-id=\"417947656\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e12mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e18.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e9 elements in 7 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e51 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e121 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e34 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e330 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e1.25 inch (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e0.5 mm below barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565815\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv id=\"jw-element-545759494\" data-jw-element-id=\"545759494\" class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e12 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/astronomyplus.com\/pages\/houdini-warranty\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062092407013,"sku":"HOU-CC12","price":527.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H12-1.png?v=1778883745"},{"product_id":"houdini-9-mm-86-coma-correcting-eyepiece-cc9","title":"Houdini 9 mm 86° Coma-Correcting Eyepiece (CC9)","description":"\u003ch1\u003eHoudini 9 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e9 mm 86° coma-correcting eyepiece for Newtonian telescopes.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e19 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.5 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRead more about\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.houdinitelescopes.com\/benefits-of-coma-correcting-eyepieces\" data-jwlink-title=\"Benefits of Coma-Correcting Eyepieces\" data-jwlink-identifier=\"24821286\" data-jwlink-type=\"page\"\u003ethe benefits of coma-correcting eyepieces\u003c\/a\u003e.\u003c\/p\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"417947655\" id=\"jw-element-417947655\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\" data-jw-element-id=\"417947656\" id=\"jw-element-417947656\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e9mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--style-striped jw-table--size-medium\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e13.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e9 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e48.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e127 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e31 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e300 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e1.25 inch (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e0.5 mm below barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565839\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e9 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062102040805,"sku":"HOU-CC9","price":514.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H9-1.png?v=1778884321"},{"product_id":"houdini-7-mm-86-coma-correcting-eyepiece-cc7","title":"Houdini 7 mm 86° Coma-Correcting Eyepiece (CC7)","description":"\u003ch1\u003eHoudini 7 mm 86° Coma-Correcting Eyepiece\u003c\/h1\u003e\n\u003cp\u003e7 mm 86° coma-correcting eyepiece for Newtonian telescopes.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWell-corrected ultra-wide\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e86° field with sharp star images\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the field even with fast f\/3 Newtonian optics\u003c\/li\u003e\n\u003cli\u003eComfortable\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e19 mm eye relief\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith foldable rubber eyecup\u003c\/li\u003e\n\u003cli\u003eMulti-coated optics combined with high transmission glass types and blackened lens edges for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esuperb contrast\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat field\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erequiring less than 0.7 diopters of accommodation across the field\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow distortion\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edelivering constant magnification across the field\u003c\/li\u003e\n\u003cli\u003eHandy size and weight with comfortable rubber grips\u003c\/li\u003e\n\u003cli\u003eFilter-threaded\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebarrel with safety kerfs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethat do not lock, slip, or tilt in the focuser\u003c\/li\u003e\n\u003cli\u003eEyepiece cap with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eglow in the dark focal length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"417947655\" id=\"jw-element-417947655\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-last-child\" data-jw-element-id=\"417947656\" id=\"jw-element-417947656\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e7mm 86° Coma-Correcting Eyepiece\u003c\/h2\u003e\n\u003ctable class=\"jw-table jw-table--style-striped jw-table--size-medium\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"50%\"\u003eFocal length\u003c\/td\u003e\n\u003ctd width=\"50%\"\u003e7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApparent field of view\u003c\/td\u003e\n\u003ctd\u003e86°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField stop\u003c\/td\u003e\n\u003ctd\u003e10.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLayout\u003c\/td\u003e\n\u003ctd\u003e9 elements in 6 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTheoretical eye relief (center of field, to glass)\u003c\/td\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseful eye relief (edge of field, to body)\u003c\/td\u003e\n\u003ctd\u003e15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. diameter\u003c\/td\u003e\n\u003ctd\u003e47 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height including eyecup\u003c\/td\u003e\n\u003ctd\u003e129 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel length\u003c\/td\u003e\n\u003ctd\u003e30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e290 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel\u003c\/td\u003e\n\u003ctd\u003e1.25 inch (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal point\u003c\/td\u003e\n\u003ctd\u003e0.5 mm below barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField flatness\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5 diopters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngular magnification distortion\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e05419980565822\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e7 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49062118916325,"sku":"HOU-CC7","price":498.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/H7-1.png?v=1778884556"},{"product_id":"houdini-coma-correcting-eyepiece-starter-set-ccset","title":"Houdini Coma-Correcting Eyepiece Starter Set 20, 12 \u0026 7mm (CCSET)","description":"\u003ch1\u003eHoudini Coma-Correcting Eyepiece Starter Set 20, 12 \u0026amp; 7mm \u003c\/h1\u003e\n\u003cp\u003eSet of three coma-correcting 20 mm, 12 mm and 7 mm eyepieces. The perfect starter package for any Newtonian telescope owner, with three of the most used eyepiece focal lengths.\u003c\/p\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545760045\" id=\"jw-element-545760045\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eHoudini Eyepiece Performance\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text\" data-jw-element-id=\"545768808\" id=\"jw-element-545768808\"\u003e\n\u003cdiv style=\"text-align: start;\" class=\"jw-element-imagetext-text\"\u003e\n\u003cp\u003eThe following graph illustrates the performance of the Houdini eyepieces in a F\/4 Newtonian telescope. Spot diagrams  with 3,000 rays are shown\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eat the center, halfway, and near the edge of the field.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe spots have been\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003estrongly\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003emagnified to show them clearly. In the center of the field a spot diagram smaller than 2' is almost perfect, at the edge a spot diagram smaller than 10' is considered excellent. The top left shows 2' and 5' circles.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is no trace of coma left in the Houdini spot diagrams. Some spherical aberration and some lateral color remain, which shows on very bright objects, such as a magnitude 1 star or Jupiter, at the edge of the field. This is not visible at all in a typical deep sky field that does not contain magnitude 1 stars. Such a field will appear essentially sharp from edge to edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/houdini-comparison-chart-20-12-7-30-high-st92yh_1024x1024.webp?v=1778881755\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"jw-heading-100\"\u003eWill it work in my telescope?\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe Houdini eyepieces were designed for Newtonian telescopes with parabolic mirrors, but they will also work well with any telescope with a focal ratio of f\/6 or slower (f\/8, f\/10, etc.). This includes slow refractors and most popular Schmidt-Cassegrain telescopes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe eyepiece is not recommended for use with fast telescope systems without parabolic mirror, such as f\/5 APO refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003eHoudini Eyepiece Specifications\u003c\/h2\u003e\n\u003cdiv class=\"jw-tree-node jw-element jw-image-text jw-node-is-first-child\" data-jw-element-id=\"545759494\" id=\"jw-element-545759494\"\u003e\n\u003cdiv class=\"jw-element-imagetext-text\"\u003e\n\u003ctable width=\"100%\" class=\"jw-table jw-table--header jw-table--style-striped jw-table--size-medium\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth width=\"12%\"\u003eEyepiece\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eFocal Length mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eAFOV °\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eField Stop mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eLayout\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eEye Relief mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eWeight g\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eDiameter mm\u003c\/th\u003e\n\u003cth width=\"6%\"\u003eHeight mm\u003c\/th\u003e\n\u003cth width=\"5%\"\u003eBarrel\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eBarrel Length mm\u003c\/th\u003e\n\u003cth width=\"8%\"\u003eFocal Point mm\u003c\/th\u003e\n\u003cth width=\"7%\"\u003eFlatness diopter\u003c\/th\u003e\n\u003cth width=\"9%\"\u003eAngular Magnification Distortion\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"12%\"\u003eHoudini 30*\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e30\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e80\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e42.0\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e580\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e64.5\u003c\/td\u003e\n\u003ctd width=\"6%\"\u003e140\u003c\/td\u003e\n\u003ctd width=\"5%\"\u003e2\"\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e38\u003c\/td\u003e\n\u003ctd width=\"8%\"\u003e+2\u003c\/td\u003e\n\u003ctd width=\"7%\"\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd width=\"9%\"\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8 \/ 6\u003c\/td\u003e\n\u003ctd\u003e20 \/ 15\u003c\/td\u003e\n\u003ctd\u003e570\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003ctd\u003e35\u003c\/td\u003e\n\u003ctd\u003e+2\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.7\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e9 \/ 7\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e330\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003ctd\u003e121\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 9*\u003c\/td\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e48.5\u003c\/td\u003e\n\u003ctd\u003e127\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e31\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHoudini 7\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e86\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e9 \/ 6\u003c\/td\u003e\n\u003ctd\u003e19 \/ 15\u003c\/td\u003e\n\u003ctd\u003e290\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003ctd\u003e129\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e-0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.5\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eAFOV = Apparent Field of View\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eLayout: Number of Elements \/ Number of Groups\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eEye Relief: Theoretical Eye Relief (center of field, to glass) \/ Effective Eye Relief (edge of field, to body)\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eDiameter: Maximum diameter of the aluminum body - the rubber grips add around 1 mm to the diameter\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eHeight: Includes the height of the eyecup\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eBarrel: Standard size 2\" = 50.8 mm or 1.25\" = 31.75 mm\u003c\/p\u003e\n\u003cp class=\"jw-text-small\"\u003eFocal Point: Position of the focal plane with respect to the barrel. Positive values are above and negative values are below the top of the barrel\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e7 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003cli\u003e12 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003cli\u003e20 mm 86° Coma-Correcting Eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/astronomyplus.com\/pages\/houdini-warranty\" rel=\"noopener\" target=\"_blank\"\u003eHoudini limited lifetime Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Houdini","offers":[{"title":"Default Title","offer_id":49090178121957,"sku":"HOU-CCSET","price":1487.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_18484779-1273-466f-b729-a87dfa210b57.png?v=1779216862"}],"url":"https:\/\/astronomyplus.com\/collections\/houdini.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}