80 Evostar Ed Doublet Refractor OTA Features
- 80mm Apochromatic Refractor
- 600mm Focal Length, f/7.5 Focal Ratio
- Proprietary MHC Multicoated Optics
- Schott BK-7 and FPL-53 ED Glass
- 2" Crayford Focuser with 1.25" Adapter
- 20mm and 5mm Eyepieces, 90° Diagonal
- 8x50 RA Erect-Image Finderscope
- Vixen-Style Dovetail Plate & Cradle-Ring
5 year manufacturer warranty (not transferable).
80 Evostar Ed Doublet Refractor OTA Description
The Sky-Watcher 80/600 Evostar ED Doublet Refractor OTA is a refractor telescope that well designed for wide-field astronomical observation of prominent nebulae, star clusters, and galaxies from a dark-sky location. Come with focal ratio f/7.5, it can be used as an astrograph for sky photography or telephoto lens. The Ultra high contrast of this Sky-Watcher ED Refractor allows the subtlest of details to be easily scrutinized under conditions of good seeing.
Metallic High-Transmission Lens Coatings (MHC)
Each air-to-glass lens surface has been coated by Sky-Watcher’s proprietary MHC. An anti-reflection metallic coatings which ensure optimum light-transmission approaching 99.5%.
Light-Baffled Optical Systems
The objective lens cell of this 80/600 Evostar ED Doublet OTA is light-baffled to reduce stray & unfocused light to insure optimum contrast. The interior of the tube is flat blackened to prevent unfocused internal light reflections from reaching the focal plane.
Precision 2” Crayford Focuser
This precision 2″ Crayford Focuser is mechanically ultra-smooth and backlash-free, offers you a fine and ultra-fine focusing adjustments.
Tube Materials
The optical tube material is rolled steel, powder-coated reflective gloss black with gold fleck accent. The front and back cells are cast-aluminum painted white & black.
Telescope Tube Attachment Hardware
The optical tube comes with attachment hardware that allows it to be securely fastened to any Sky-Watcher Mount. The quick-release tube rings provided with Evostar ED80 are cast-aluminum, painted white.
In the Box:
- ED80 OTA
- 2″ Diagonal
- 1.25″ Focuser Adaptor
- 8×50 Finderscope with Bracket
- Eyepiece – LET 28mm
- Tube Ring Attachment to Any Sky-Watcher Mount
- Piggyback Bracket
Optical Design
ED Refractor OTA
The optical design of a telescope is a feature that defines what sort of observing the telescope is suitable for.
Optical Diameter
80mm
The aperture (diameter) of a telescope’s main lens or mirror. This describes how much light a telescope can grasp.
Focal Length
600mm
The distance that the light has to travel between the aperture and the focal point. A smaller focal lengths will deliver a wider field of view.
F/Ratio
f/7.5
The relationship between the focal length and the aperture, larger f/numbers imply higher magnification.
Eyepieces
LET28mm
Short focal length (5-10mm) eyepieces generally provided high power magnifications.
Focuser
2"
Wider focusers allow for a wider field of view.
Finder Scope
9x50mm
A low powered mini telescope with a wide field of view to assists with locating objects before observe through the main telescope.
Diagonal
2" 90° Dielectric Diagaonal
A small triangular attachment for making it easier to observe through the telescope.
Highest Practical Power
160x
Exceeding the Highest Practical Power will result in a fuzzy image.
Recommended Usage
Advanced Users
The recommended applications for this optic.
Tube Dimensions
10cm x 62cm
The physical size of the telescope tube.
Tube Weight
2.47kg
You may need a counterweight to prevent your telescope from rotating downwards due to gravity.