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Sky Watcher Esprit 100mm ED Triplet Apo Refractor OTA # S11410

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Brand Sky Watcher
Part Number S11410

Product Info

Manufacturer Description

Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

With their three-element air spaced objective lens design, false color is completely eliminated, yielding exceptional contrast and sharpness. The included 2-element field corrector guarantees a flat field across the entire imaging plane. The Sky-Watcher exclusive Helinear Track focusing system provides a smooth, rock-solid focuser with zero image shift.

All Sky-Watcher USA Esprit refractors come with a 9 x 50 right angle finderscope, 2-inch Star diagonal, 2-element field flattener, camera adapter, D-style dovetail and padded case. Everything you need to get out under the stars.


  • Optical Design: Refractor
  • Field Flattener: Included, thread-on
  • Aperture (mm): 100 mm (3.94 in)
  • Focal Length: 550 mm
  • Focal Ratio: 5.5
  • Finder Scope: 9x50, erect-image, right-angle
  • Diagonal: 2", dielectric coatings
  • Tube Rings: With 3" (CGE Style) dovetail plate
  • Highest Useful Magnification: 236 x
  • Lowest Useful Magnification: 14 x
  • Resolution (Rayleigh): 1.39 arc seconds
  • Resolution (Dawes): 1.16 arc seconds
  • Light Gathering Power (Compared to human eye): 204 x
  • Optical Coatings: Fully multi-coated
  • Fully Illuminated Field: 43 mm (1.69 in)
  • Optical Tube Length: 17 in (432 mm)
  • Optical Tube Weight: 18 lbs (8.16 kg)


Product carries full 2 year manufacturer factory limited warranty (within US only).

Manufacturer part number: S11410


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Telescope Aperture 3.94" (100mm)
Manufacturer Sky Watcher
Telescope Aperture 81mm - 125mm
Telescope Series Sky Watcher Esprit APO