Bronica's 645 telephoto — the leaf-shutter Zenzanon-PE 200mm f/4.5 for the ETR system.
The Bronica Zenzanon-PE 200mm f/4.5 is a telephoto lens for the Bronica ETR 6x4.5 medium-format system. It belongs to the later PE generation of Zenzanon optics made for the ETRSi era, replacing the earlier MC 200mm in the line. On the 645 format a 200mm gives useful reach for distant and isolated subjects.
This manual-focus lens mounts on the Bronica ETR leaf-shutter bayonet, with a focal length of 200mm and a maximum aperture of f/4.5. It uses the in-lens Seiko leaf shutter common to the ETR system, so flash synchronisation is available at every shutter speed. Optical construction, weight and filter size are omitted here rather than stated without confirmation from the sources used.
A 200mm on 6x4.5 acts as a longer portrait and short telephoto, compressing perspective and separating the subject from a softly rendered background. It suits head portraits taken from a distance, landscape details and general subjects needing reach. Because of the focal length and typical medium-format shutter speeds, a tripod or firm support is recommended.
On the used market the PE 200mm is less common than the shorter PE primes but is generally affordable relative to specialist lenses. Check the leaf shutter fires evenly across speeds and inspect the longer barrel for internal haze, fungus and separation. Confirm the aperture blades are dry and that the mount couples securely to the ETRSi body and film back.