Sky-Watcher USA
Esprit 80mm ED APO Refractor (S11400)
This item is out of stock but you can place an order now and we’ll ship when it becomes available.
Free Shipping in the CONUS!
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 |
|
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 |
