The Macro Zenzanon PG 110mm f/4 is designed to compensate for aberrations in short-distance macro photography, but it can also be used as a general pu

The Macro Zenzanon PG 110mm f/4 is designed to compensate for aberrations in short-distance macro photography, but it can also be used as a general purpose lens. The minimum focusing distance is 66cm (2.2 feet) yielding a magnification ratio of 1:4. This lens is perfect for commercial photography and document copying, producing sharp images free of distortion and field curvature. Zenzanon PG interchangeable lenses were all developed specifically for the GS-1 body, employing computer-aided optical design and multi-coating technology. PG lenses are equipped with a shutter that opens and closes at a signal from the camera body. Shutter speeds are available from 1/500th of a second to 16 seconds. PG lenses must be mounted with the shutter cocked.