When The ED81S was introduced last year it set a new standard for 80mm APO Refractors. The combination of better color correction from the new ED glass and brighter images from its fast f/7.7 focal ratio will satisfy the most demanding visual astronomer or astro-photographer. The new ED glass is made from environmentally friendly lead-free materials. The optical tube is very stable yet light weight. The top carry handle also includes a 1/2-20 stud for piggyback camera mounting. The supplied flip mirror system is threaded for two-inch filters.Features:Red Dot Finder 2" Eyepiece Adapter DualT-thread Flip-Mirror - DUAL 1.25"Eyepiece Adapters - 90mm Tube RingsCarry Handle - Dovetail Tube Plate
