{"product_id":"masuyama-2-ortho-plossl-40-mm-eyepiece-53-mop-4053","title":"Masuyama  2\" Ortho Plössl  40 mm Eyepiece 53° (MOP-4053)","description":"\u003ch1\u003eMasuyama  2\" Ortho Plössl  40 mm Eyepiece 53°\u003c\/h1\u003e\n\u003cdiv\u003eMasuyama eyepieces, rigorously designed and manufactured in Japan with the highest quality standards, have always been a benchmark for discerning visual amateur astronomer.\u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eMasuyama eyepieces are known for their clear and high contrast imaging and velvet black background. \u003cspan\u003e Masuyama eyepieces incorporate a five-element \"hybrid Ortho-Plossl\" design. They have much better performance towards the edge of the field and improved color performance compared to Plossls and other competing designs. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe good contrast of these high-end eyepieces is achieved with a special cut, internal diaphragms and the best possible internal blackening. Due to the elaborate lens design, the eyepieces get by with only 5 elements, with good correction at the same time.\u003c\/p\u003e\n\u003cp\u003eThe eyepieces were developed by renowned optician Dr. Masuyama. Among other things, Dr. Masuyama designed an eyepiece with a focal length of 100 mm, which was used on the historic 60-inch telescope at Mount Wilson Observatory in California. We are pleased to offer you these legendary eyepieces with the latest glass and coating technology.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003eFocal length: 35 mm.\u003c\/li\u003e\n\u003cli\u003e53° apparent field of view (AFOV).\u003c\/li\u003e\n\u003cli\u003eEye relief: 28 mm.\u003c\/li\u003e\n\u003cli\u003eModified Plössl optical design with 5 lenses in 3 groups.\u003c\/li\u003e\n\u003cli\u003eFMC - Fully Multi-Coated optical treatment.\u003c\/li\u003e\n\u003cli\u003eHigh refractive index lenses for excellent containment of chromatic aberration.\u003c\/li\u003e\n\u003cli\u003eBlackened lens edge.\u003c\/li\u003e\n\u003cli\u003eRetractable rubber lens hood.\u003c\/li\u003e\n\u003cli\u003eStandard 2\"\/50.8 mm barrel with threads for in-cell filters.\u003c\/li\u003e\n\u003cli\u003eSize: 53 mm OD x 115 mm L.\u003c\/li\u003e\n\u003cli\u003eWeight: 320 g.\u003c\/li\u003e\n\u003cli\u003eJapanese manufacture with the highest quality standards (Ohi Kohki Co., Ltd.).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications \u003c\/h3\u003e\n\u003ctable class=\"x1vathgz x1gukg7c xezivpi xgqtt45 x1s8wshw x1fdb1hi\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xpps94y x1s688f x1ku3myg x3ajldb\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xpps94y x1s688f x1ku3myg x3ajldb\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eFocal length\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003e35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eApparent field of view (AFOV)\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003e53°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eEye relief\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003e28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eOptical design\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eModified Plössl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eOptical configuration\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003e5 lenses in 3 groups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eOptical coating\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eFMC - Fully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eLenses\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eHigh refractive index lenses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eLens edge\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eBlackened lens edge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eLens hood\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eRetractable rubber lens hood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eBarrel\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eStandard 2\"\/50.8 mm barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eFilter threads\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eThreads for in-cell filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eSize\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003e53 mm OD x 115 mm L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eWeight\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003e320 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eManufacture\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eJapanese manufacture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd class=\"xx0rg4r xj0a0fe xckciy2 xmi3gmm xvm2478 x5xtxb0 x1yc453h xso031l x1q0q8m5 xsfyl8r x5o0mj3 x16dsc37\"\u003eOhi Kohki Co., Ltd.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEyepiece\u003c\/li\u003e\n\u003cli\u003eLens Caps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eMasuyama 1-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Masuyama","offers":[{"title":"Default Title","offer_id":67634621743333,"sku":"MAS-MOP-4053","price":475.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0474107_masuyama-ortho-plossl-mop-okular-40-mm-53-2-508-mm.jpg?v=1791481217","url":"https:\/\/astronomyplus.com\/products\/masuyama-2-ortho-plossl-40-mm-eyepiece-53-mop-4053","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}