Sky-Watcher Evostar 80 ED-APO Refractor
- 80 mm ED-Apochromatic Refractor with Schott BK-7 and FPL-53 ED glass
- 600 mm focal length (f/7.5)
- Dual-speed 2″ Crayford-type focuser with 1.25″ adaptor
- 8×50 RA Erect-image finderscope
- 2″ dielectric diagonal
- 20 mm and 5 mm 1.25″ eyepieces
- Tube-ring attachment hardware
- Aluminum carry case
This Sky-Watcher 80 mm Evostar APO telescope is a doublet ED-Apochromatic refractor that provides the finest images obtainable in this design and price class. This doublet refractor delivers dramatic, jet-black skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none. This scope is your ticket to exploring the wonders of the celestial sphere.
Due to their unobstructed aperture and textbook-like diffraction patterns and exotic optical properties, the ED-APO produces the sharpest, highest quality imaging obtainable from any telescope optical design. These breathtaking sharp, contrasty celestial views are coveted by experienced amateur astronomers.
Fortunate indeed is the amateur astronomer with a SW ED-APO 80 mm refractor on a clear night with transparent skies and a stable atmosphere. The Sky-Watcher ED-APO 80mm is a modestly wide-field telescope offering bright, wide swaths of sky in a single view. It is well suited for wide-field astronomical observation of prominent nebulae, star clusters and galaxies from a dark-sky location, or can be used as an astrograph for sky photography. This scope can also be used as a telephoto lens or a spotting scope for terrestrial viewing. The small silhouette of the Sky-Watcher ED-APO 80 mm makes for an excellent compact, portable telescope that travels easily, is light-weight, and fits into a small space.
As an astrograph, the S-W EvoStar 80ED-APO delivers superb performance imaging a wide spectrum of astronomical phenomenon. Sky-Watcher ED-APO refractors will provide exceptional viewing or photography. ED-APO optical design assures virtual elimination of residual “false color” (chromatic aberration) normally present in 2-element achromatic optics. Sky-Watcher APO refractors utilize the finest extra-low dispersion (ED) glass available, FPL-53. This results in the best color correction for an ED doublet objective for a telescope. Schott Glass is used by Sky-Watcher for the front crown glass element and also for the ED 2 lens element because Schott is the recognized world leader in glass utilized for precision optical lens systems.
The objective lens cell is light-baffled to reject stray, unfocused light. The draw tube is likewise baffled to insure optimum contrast. The tube interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane. The optical tube material is aluminum, powder-coated reflective gloss black with gold fleck accent. The front and back cells are cast-aluminum painted white or black. The Sky-Watcher APO optical tubes come with attachment hardware that allows them to be securely fastened to compatible mounts with quick-release tube rings. All Sky-Watcher USA EvoStar's come with 2-speed backlash-free 2” Crayford-style focusers and quality foam-lined metal carrying cases as standard equipment.
This scope includes an 8×50 Right-Angle Erect-Image Finder Scope and a 2" Dielectric type Star Diagonal, and two Eyepieces.
NOTE: The photo may show the telescope on a mount for illustration purposes only! This product does Not include a mount!
|Optical Design||ED Doublet Refractor|
|Optical Glass||BK-7 and FPL-53 (ED)|
|Lens Coatings||Fully Multi-Coated|
|Primary Aperture (mm)||80 mm|
|Focal Length (mm)||600 mm|
|Dawes Limit||1.45 arcsec|
|Rayleigh Limit||1.75 arcsec|
|Focuser||2" Dual Speed Crayford|
|OTA Length (Retract/Ext.)||22.5"|
|OTA Outer Diameter||4.56"|
|OTA Weight (with accessories)||7.3 lb|
|Included Finder||8x50 RACI|
|Included Diagonal||2" Dielectric Refl. Diag.|
|Included Eyepieces||25 mm LET/5 mm Planetary|
|Included Case||Yes, Aluminum|