When The ED81S combines better color correction from the new ED glass and brighter images from its fast f/7.7 focal ratio. This will satisfy the most demanding visual astronomer or astro-photographer. The special ED glass produces clear and high contrast viewing, virtually free of false color. The design uses newly developed, environmentally friendly glass technolgy. The optical tube is very stable yet light weight. The top carry handle also includes a 1/2-20 stud for piggyback camera mounting. Vixen's new Dual Speed Focuser, now standard on the ED81, provides fine focus adjustments for 1/7th speed focusing.
The ED81S comes complete with:
- Dual Speed Focuser
- 90mm Tube Rings
- Carry Handle
- Dimensions: 90mm x 573mm/ 3.5 x 22.5in
- Weight: 3.4 kg/ 7.5 lbs