It so happened that I took my second-hand copy for a wild freebie (I would not have taken it more expensive). I took it for fun. Used on Nikon D3100 (without screwdriver) with manual AF, but this is not a problem. As a rule, I set it to infinity and everything was in focus. Then I used it on the D7000, where AF could be used. In general, the lens is funny, but if you take it to indulge, I recommend buying cheaper options (Example: Zenitar MC 16 mm f/ 2.8 Fish-Eye) or even renting it for a couple of days. Buying it in a store if you are an ordinary amateur and do not do 3D, I think it's stupid) But if the budget allows, then the choice is always yours.