>>3159611I'm mounting a leitz colorplan 90/2.5 on Olympus mount using OM 24/2 bayonet ring, part of a 75-150/4 body, a brass helicoid from Agfa Super Silette and billet exterior. Shown here missing the aperture ring and engravings. Need to order a chinese microscope aperture and a 46-49 step up ring to get metal filter threads..