Sky-Watcher Esprit 120mm ED Triplet APO (S11420)

Designed with the discerning astrophotographer in mind, Sky-Watcher’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more. With the Esprit’s three-element, air spaced objective lens design, false color is virtually eliminated, yielding exceptional contrast and sharpness. Each element is fully multi-coated with Sky-Watcher’s proprietary Metallic High-Transmission Coatings™ (MHTC)™, producing a transmission rate that rivals any refractor on the market.

In addition to superb optics, all Esprits feature exclusive dual-speed, Helinear track focusers, which provide smooth, rock-solid focusing with zero image shift. Using a captain’s wheel design all focusers can be rotated, giving astrophotographers flexibility when framing their image.

As is customary, Sky-Watcher supplies everything you need to get out under the stars, including a 2-element field corrector, which guarantees a flat field across the entire imaging plane. All Esprit refractors also come with an 8x50 right angle finderscope, 2-inch star diagonal, M48 camera adapter, mounting hardware, and padded case.

• Triplet super-apochromatic design
  
• Three-element, air-spaced optical assembly virtually eliminates false color
  
• 120mm aperture, 840 focal length, f/7 focal ratio
  
• 3.4-inch dual-speed rack-and-pinion, Helinear track focuser
  
• Rolled steel optical tube with white, glossy finish
  
• Included accessories: field flattener, tube rings, D-style dovetail, 8x50 right-angle finderscope, M48 camera adapter, 2-inch dielectric diagonal, and padded hard case
  

Technical Specifications

Optical Info
Optical Design	ED Triplet Refractor
Lens Coatings	Fully Multi-Coated
Glass Type	BK7 (2)/FPL-53(ED)
Primary Aperture (mm)	120
F/Ratio	7
Focal Length (mm)	840
Observational Info
Dawes Limit	0.97
Rayleigh Limit	1.16
Limiting Mag.	12.9
Minimum Magnification	17
Maximum Magnification	236
Light Gathering (compared to next size down)	44%
General Info
Focuser	3.4" Dual Speed R&P
OTA Length (Retract/Ext.)	27.4"/31.5"
OTA Outer Diameter	6.875"
OTA Weight (with accessories)	22
Accessories
Included Finder	8x50 RACI
Included Diagonal	2" Dielectric
Mounting Accessories	Rings/D-Rail
Included Eyepieces	None
Included Case	Yes
Corrector	Yes

In the Box

• Sky-Watcher Esprit 120mm ED Triplet APO
  
• Field Flattener
• Tube Rings
• D-style Dovetail
• 8x50 Right-Angle Finderscope
• M48 Camera Adapter
• 2-inch Dielectric Diagonal
• Padded Hard Case

Warranty & Manuals

Sky-Watcher 2-Year Warranty