Topcon's telephoto — the UV Topcor 200mm f/4 for the Topcon camera system.
The Topcon UV Topcor 200mm f/4 is a telephoto prime from Topcon (Tokyo Kogaku), a Japanese optical and camera manufacturer, featuring the UV (ultraviolet) optimised optical coating or formula. Topcon cameras used a distinctive exakta-compatible bayonet (RE mount) for their SLR range.
The lens delivers 200mm at f/4 maximum aperture with Topcon RE bayonet or compatible coupling, manual focus and aperture, and full-frame 35mm coverage. The UV Topcor designation indicates ultraviolet-optimised transmission for scientific or technical applications.
Topcon RE-mount lenses were used with the Topcon Super D and RE Super professional SLR cameras. The RE mount adapts to M42 via available adapters. UV-optimised optics have scientific applications for UV photography and fluorescence imaging.
Identify mount type from physical inspection — likely Topcon RE. Test aperture and focus ring operation. Inspect element coating and clarity. For UV photography applications, verify UV transmission against a UV source.