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Sky-Watcher USA

Esprit 80mm ED APO Refractor (S11400)


  • 1,64900

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


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Our Take

The Sky-Watcher 80 is an excellent moderate-cost, wide-field refractor for astrophotography.  The build quality is excellent and includes a robust and smooth focuser.  With the included thread-on field flattener, this scope is an excellent option for any astrophotographer.

Quick Overview

  • 80 mm apochromatic 3-element refractor
  • 400 mm (f/5)
  • Fully multi-coated
  • Thread-on field flattener
  • 2.7" focuser w/micro focus
  • 2" Diagonal with dielectric coatings
  • 9x50 RA erect-image finderscope
  • Canon camera adapter
  • Tube rings with CG5 style dovetail bar
  • Aluminum foam lined case
  • 33mm image circle
  • OTA Weight: 8.8lbs.
  • OTA Length: 17.375" (fixed dew shield)
  • Telescope Back Focus: >160mm
  • Flattener Back Distance: 66mm

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 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.

 

Model

80 mm

Optical design

Apochromatic refractor

Focal length

400 mm

F-ratio

5

Back focus

75 mm

Image circle

33 mm

Lens elements

3

Lens glass

FPL-53 ED and Schott glass

Focuser

2.7 inch rack-and-pinion focuser
with micro focus

Focuser travel

60 mm

Removable field corrector

Yes

Finderscope

9 x 50 right angle, correct image

Mount type

V-style dovetail

Length (extended/retracted)

17.4 in/17.4 in

Outer diameter

4.875 in

Tube weight (pounds)

8.8

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