The RodenstockApo-Rodagon D 75mm f4 M 1:1 is a professional apochromatic lens for enlarging or bellows use. In excellent condition overall, with clean glass and some light fasing of the barrel anodi.This lens has a standard LTM (39mm) thread mount but it is not designed to be mounteddirectly on LTM cameras. Don’t buy this for your rangefinder, please.