All UV TOPCOR lenses were specially designed for use on TOPCOR 35mm SLR cameras and were not inferior, if not superior to, other more expensive lenses for focal plane shutter cameras in their resolving power and rendition.
All UV TOPCOR lenses are specially coated to cut the ultra-violet (UV) rays and thus give breath-taking true-to-life color renditions of outdoor scenes at all times, and eliminate the need for an UV filter outdoors for black-and-white camera work.
All UV TOPCOR lenses are straight helicoid focusing and incorporate the electric-eye automatic exposure system, the fully automatic instant re-opening lens diaphragm action, as well as being coupled with the quick-as-a-wink mirror action.
An exclusive bayonet mount permits simple, accurate and speedy exchange of the lenses, while the SEIKOSHA SLV No. 00 shutter is incorporated in the camera body.