Been a non pro at photography most of my life, and dealt mostly doing video work. I spent my time many hours for year as a musician. And yes I did come here for a purpose! Expert advice from ones who know! Why? Some professional photographer saw this lens in a listing I had to get rid of some old camera gear, an Icarex 35, a Selectaflex camera, and a Contaflex camera, along with a couple nikkon lens, and a wide angle 5.7mm Samigon-Glanz wide angle exit pupil lens; along with the iscorama. So the professional photographer asked about the one said lens, and offered me $200 for the icarex and the iscorama. He didn't want the other items. So I then thought why did he want those 2 items and nothing else. So I looked it up! Its like this Mr. Complainer it was one of your own that was taking advantage of not knowing what the iscorama was. And believe me Mr. Complainer, I am not alone in novice photography buff circles that don't know. It be like you being a jazz drummer, and you don't know who Chick Webb was, or Papa Joe Jones, Irv Cottler, Joe Morello were! Life is about learning something each and everyday Mr. Complainer! I did 2 days research on my own before coming to the board. But as in life you always bump into one A-hole that whines and cry's instead of being positive.