Schneider Kreuznach Rollei SL Xenon 50mm f1.8 is a reasonably uncommon lens for the Rolleiflex SL35 camera utilising the QBM mount, and it also probably has the longest name. In 1973 this Xenon lens replaced the Carl Zeiss Planar 50mm f1.8 as a standard kit lens for the SL35 but was only manufactured between 1972…