I havea rolleifcord III and it is the xenar which is the schneider copy of the tessar. I really enjoy the lens it just has to have a hood on. At f4 I really like what comes out of the camera and at f11 it's the sharpest thing I have shoot in medium format. Compared to hasselblad 50 fle and 80. The images are lower contrast to more modern lens but I just print on higher contrast paper.