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Sky-Watcher USA - Esprit 100mm ED Triplet APO Refractor


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Availability: Available - Ships in 3-5 Days


Available - Ships in 3-5 Days

Manufactured by: Sky-Watcher USA


Sky-Watcher USA Esprit 100mm ED Triplet APO Refractor 

Designed with 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.


  • 100 mm apochromatic 3-element refractor
  • 550 mm (f/5.5)
  • Fully multi-coated
  • Thread-on field flattener
  • 3.0" focuser w/micro focus
  • 2" Diagonal with dielectric coatings
  • 9x50 RA erect-image finderscope
  • Canon camera adapter
  • Tube rings with CGE style dovetail bar
  • Aluminum foam lined case
  • 40mm image circle
  • OTA Weight: 16.3lbs.
  • OTA Length: 24.5" Extended and 17.3125" Retracted
  • Back focus: 68.819mm












Additional Information

Name Sky-Watcher USA - Esprit 100mm ED Triplet APO Refractor
Manufacturer Sky-Watcher USA
Model S11410
Manufacturer Part No S11410
Telescope Aperture 3.1" - 4"
Aperture 100 mm (3.94 in)
Field Flattener Included, thread-on
Finderscope 9x50, erect-image, right-angle
Focal Length 500 mm (20 in)
Focal Ratio 5
Highest Useful Magnification 236 x
Light Gathering Power 204 x
Limiting Stellar Magnitude 12.5
Lowest Useful Magnification 14 x
Optical Coatings Fully multi-coated
Optical Design Refractor
Optical Tube Length 17 in (432 mm)
Optical Tube Weight 18 lbs (8.16 kg)
Resolution (Dawes) 1.16 arc seconds
Resolution (Rayleigh) 1.39 arc seconds
Star Diagonal 2", dielectric coatings