Sky-Watcher 100mm Esprit ED Triplet APO Refractor

  • Aperture: 100 mm (3.94-inch).
  • Focal Ratio: f/5.
  • Magnification up to 236x.
  • 9x50 Optical Finder Included.
  • Spectacular Imaging Performance.


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  • Regular price $2,499.00

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Sky-Watcher 100mm Esprit ED Triplet APO Refractor

The Sky-Watcher Esprit was designed with astro-imagers in mind that are eager to develop their astro-imaging skills. Its three-element air spaced objective lens design, fully removes false color giving you prime contrast and sharpness. The included two-element field corrector guarantees a flat field across the entire imaging plane giving you brighter images. 

The air-spaced ED APO Optics are fully multi-coated for extra clarity, contrast, and protection. Three-element apochromatic objective with an included thread-on field flattener to the oversized micro-focuser. This system produces a 40 mm image circle, and you have about 69 mm of back focus for plenty of imaging accessories. Use it as a giant lens to capture the Universe with one of today’s amazing CCD cameras.

The Dew Shield, when extended, will protect the optics from dew and help increase contrast by blocking stray light that might otherwise strike the glass. The shield is fully retractable when necessary in order to shorten your OTA for storage and travel.

The Helinear Track Focusing System, a Sky-Watcher exclusive, is a rock-solid 2.7-inch rack and pinion focuser that will perform smoothly, without image shift, due to the extra support rail on the top of the drawtube. The micro focuser allows you to make strong and fine adjustments to focus, and the knobs are easy to turn, even with cold hands or with gloves on. A thread-on step down ring takes the opening down for 2-inch accessories.



Aperture100 mm (4")
Dew Shield IncludedYes
Exterior ColorGloss White
Focal Ratiof/5
Free ShippingYes
Highest Useful Magnification236x
Limiting Stellar Magnitude12.5
Mount TypeNone/ OTA Only
Optical DesignTriplet
OTA Length24.5" Extended & 17.3" Retracted
OTA Weight16.3 lb.
Telescope SeriesSky_Watcher Esprit


  • Sky-Watcher 4-Inch f/5.5 ED Triplet APO Refractor.
  • 9x50 RA Erect-image Finderscope and Bracket.
  • Thread-on Field Flattener.
  • 2.7-inch Rack & Pinion Microfocuser.
  • 2.7-inch to 2-inch Thread on Adapter.
  • 2-inch to 1.25-inch Adapter.
  • 2-inch Diagonal.
  • Canon Camera Adapter.
  • Tube Rings with "D" Series Dovetail Bar.
  • Aluminum Case.
Customer Reviews
5 Based on 1 Reviews
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Michael E.
United States United States
Esprit 100ed

Definitely the best scope I have used in its class. I love using it, it’s clear, matches with my camera well, AND I can use visually if I wanted to. I think smaller is better for beginners, but I would still recommend this as a good starter scope. It comes with everything you need MINUS the mount of course