Sorry to post this single question. I neither know what's the morre appropriated forum to do it, because in reality I am not a beginner. Let's go ahead. I have two Wollensak lenses: Graflex Optar 6.8 and Wollensak Raptar 3.5 (Alphax shutter), both of 90mm, and I suppose that both of them are wide angles for the 4x5 size. The Optar seems more modern, but the Raptar is more rapid (3.5). However, the Raptar goes up just to 100 + B + T and the Optar up to 400. The Raptar has not a device to open and close the lens. I have to set it to T (that is side by side with the 100). After exaustive search at the internet and literature I did not finde NO ONE referente to the 3.5 Wollensak Raptar (there are a lot of other 3.5, but not this one). Thus as I intend to sell one of them, I wonder what's the most interesting and useful for my Crown Graphic Special 4x5. In terms of money, I know that the Optar have a better price. Finaly, I seems a little strange to me a wide angle with 3.5 when the most of them are 6.8 (angulon, optar, etc). I know there are a lot of technical features regarding the subject. What about?