I have a 270/5,5 Tele-Xenar that I now use with a Century Graphic 2x3, I need the tele construction since the bellow is very short, 190mm. In short distance this lens is very sharp, but on longer distance not so sharp, I think distance haze is my problem. I have also used this lens on my Arca 4x5 and it works fine, but not much movments.