Selling a large lens. The Century Tele-Athenar is about 40 inches long. They were used for movie making in the 70s and 80s. Could be used as a camera lens or telescope. Set up with a T2 mount system fitted with a Nikon mount. The photos were taken just prior to listing. I used an m4/3 camera, so the effective focal length is 2000mm. Zero rock light is about 3 miles away, the buildings around 1 mile. The lines are wavy because of atmospheric distortion. It works well, but will need a mounting bracket as the length changes as you focus. The dark patches you see in some of the shots are closeby tree branches, not the lens. I also have a Wollensak 2000mm mirror lens and a Century 1200mm for sale under camera lenses.