About the Vixen ED81S
81mm Refractor Telescope OTA...
When the Vixen ED81S - 81mm Refractor Telescope was introduced, it set a new standard for APO Refractors. The combination of better color correction from the new Vixen Telescope ED glass and brighter images from its fast f/7.7 focal ratio will satisfy the most demanding visual astronomer or astrophotographer.
The new ED glass incorporated into the Vixen ED81S - 81mm Refractor Telescope produces clear and high contrast viewing, virtually free of false color. Vixen''s innovative design uses newly developed, environmentally friendly glass technology. The Vixen Telescope optical tube is very stable yet light weight. Vixen''s new Dual Speed Focus, now standard on the ED81 Refractor, provides fine focus adjustments for 1/7th speed focusing. Combine with a Vixen Telescope Mount for excellence in astrophotography.
Don'''t forget... We also carry many fine Vixen Accessories including Vixen Eyepieces, and Vixen Reducers and Adapters. There'''s a complete line of Vixen Telescope Mounts and Vixen Camera Mounts, too!
Vixen ED81S - 81mm Refractor Telescope OTA Features...
- Better color correction from the new ED glass and brighter images
- Fast f/7.7 focal ratio will satisfy the most demanding visual astronomer or astro-photographer
- Produces clear and high contrast viewing, virtually free of false color
- Vixen''s new Dual Speed Focus, now standard on the ED81 Refractor
- Provides fine focus adjustments for 1/7th speed focusing
- Optical tube is very stable yet light weight
Vixen ED81S - 81mm Refractor Telescope OTA Specifications...
Optical Design: ED Apochromatic Refractor
Focal Length: 625mm
Focal Ratio: f/7.7
Coating: Multi Coating
Resolving Power: 1.43 arc sec
Limiting Magnitude: 11.3
Light Gathering Power: 134x
Finder Scope: Optional
Focuser: Dual Speed
Adapter Thread: 60mm/50.8mm
Astrophotography: Prime Focus, Eyepiece Projection & Afocal Imaging
Visual Back: Compression Ring
Optical Tube Length: 23" (585mm)
Optical Tube Diameter: 3.5" (90mm)
Outside Dew Shield Diameter: 100mm
Optical Tube Weight: 5.1lb
Accessories Included: Tube Rings;
Available Accessories: Flip Mirror Diagonal; Dovetail Plate; Red Dot Finder; Carry HandleVixen Product Number: 5864