The Rodenstock Rogonar-S 50mm f/2.8 Lens is designed for amateurs and professional labs that develop standard print formats. This Rodenstock Rogonar-S enlarging lens is a general purpose lens that appeals to all kinds of light situations. It can yield sharp enlargements even at high magnifications.The standard Rodenstock Rogonar-S 50mm f/2.8 Lens is used for 35mm enlargingThis Rodenstock Rogonar-S enlarging lens  has a mount size of 39mmThe range of aperture is f/2.8-16The range of magnification is 2x-10xThe filter size of this Rodenstock enlarging lens is 40.5mm