Buyers beware. The pictures of this old dog make it look better than it is! It's got a nasty chip out of the front glass which you can see, and it has some pretty serious internal fog which you can't see. That said, if you're dreaming of building a wood box that receives 14X17 Xray film, this might be the best lens you'll have a chance to get. These f7.7 process dagor's are legendary for the coverage. Will it cover 1620? I don't know. Woof! No aperture, you have to make some waterbury stops for it. Yes it forms a decent image but if you could make the fogging go away it would be better contrast wise. No return on this beast. Priced accordingly. $185 Add $11 for the postman in USA. Lens board not included. Flange is.