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Sky-Watcher USA

Esprit 120mm ED Triplet APO Refractor (S11420)

  • 3,19900

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Our Take

Featuring top-quality optics, smooth mechanics, and excellent build quality, the Esprit 120 is a superb imaging or visual instrument.  With the included field-flattener, the Esprit 120 yields a 43mm corrected image circle, allowing the use of a full-frame DSLR while providing pinpoint stars to the corners.  The Sky-Watcher Esprit 120mm is truly a delight for any astrophotographer.  

Quick Overview

  • 120 mm apochromatic 3-element refractor
  • 840 mm (f/7)
  • 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
  • 43mm image circle
  • OTA Weight: 22lbs.
  • OTA Length: 31.5" Extended and 27.375" Retracted
  • Telescope Back Focus: >225mm
  • Flattener Back Distance: 75mm


Unsurpased Performance

Esprit three-element air spaced optics deliver images equal to scopes costing thousands of dollars more


Two-element Field Corrector

All Sky-Watcher USA Esprits include a two- element field corrector that guarantees a flat field across the entire imaging plane


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, mounting rings, dovetail plate and foam-lined hard case. Everything you need to get out under the stars.



120 mm

Optical design

Apochromatic refractor

Focal length

840 mm



Back focus

75 mm

Image circle

43 mm

Lens elements


Lens glass

FPL-53 ED and Schott glass


3 inch rack-and-pinion focuser with micro focus

Focuser travel

87 mm

Removable field corrector



9 x 50 right angle, correct image

Mount type

D-style dovetail

Length (extended/retracted)

31.5 in/27.4 in

Outer diameter

6.875 in

Tube weight (pounds)


Customer Experiences



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