Bronica's later 645 wide — the leaf-shutter Zenzanon-PE 50mm f/2.8 for the ETR system.
The Bronica Zenzanon-PE 50mm f/2.8 is a wide-angle lens for the Bronica ETR 6x4.5 medium-format system. The PE line was the later, refined generation of Zenzanon optics for the ETRSi era, replacing the earlier MC and EII glass. On the 645 frame a 50mm provides a wide field of view suited to scenic and interior work.
This is a manual-focus lens for the Bronica ETR leaf-shutter mount, with a focal length of 50mm and a maximum aperture of f/2.8. It carries the in-lens Seiko leaf shutter used across the ETR system, giving flash synchronisation at all shutter speeds. Further optical details such as element count and filter thread are omitted here rather than being stated without confirmation.
A 50mm on 6x4.5 covers a wide angle of view that suits landscapes, architecture and group scenes, with the tonal gradation of the larger negative. The comparatively fast f/2.8 aperture for a medium-format wide is helpful in lower light and gives some control over depth of field. The leaf shutter also allows fill-flash at any speed outdoors.
On the used market the PE 50mm is sought after and priced above the older MC equivalents, reflecting the improved later coatings. Check the leaf shutter for even firing across speeds, inspect the glass for haze, fungus and separation, and confirm the aperture blades are dry. Verify the electronic and mechanical coupling to the ETRSi body works, and check the mount for wear.