Spotting scope/lens, I have hard mounted a variable t-extender to the back. Takes AWESOME pictures(I am a camera nut) better than an ETX, honest! To see some pictures, email me, and I'll give you an address(it won't let me post it) the ones of the guy surfing where taken through this lens at about 600m! You can take the telexenteder off and use it as a spotting scope, takes 1-1/4" eyepieces. The lens is anout 4" in dia, about 10" long, has a sight and focus knob on the side. Will ship in U.S. for free.