Bronica's ETR telephoto — the leaf-shutter Zenzanon-MC 200mm f/4.5 for the 645 system.
The Bronica Zenzanon-MC 200mm f/4.5 is a telephoto lens for the Bronica ETR 6x4.5 medium-format system. The MC prefix marks the earlier multi-coated Zenzanon generation that accompanied the first ETR bodies, ahead of the later PE optics. At 200mm it is one of the longer primes in the early ETR range, aimed at reaching more distant subjects on the 645 frame.
This is a manual-focus lens for the Bronica ETR leaf-shutter mount, with a 200mm focal length and a maximum aperture of f/4.5. Like the rest of the ETR line it carries an in-lens Seiko leaf shutter, so flash sync is available at every shutter speed. Precise optical construction, weight and filter thread are omitted here because they are not confirmed in the sources consulted.
A 200mm on 6x4.5 works as a longer portrait and short-distance telephoto, isolating a subject against a softened background and compressing perspective. It suits head portraits taken from a greater distance, along with landscape details and general subjects that need reach. A tripod or firm support helps at the slower shutter speeds medium format often demands.
On the used market the MC 200mm is less common than the shorter ETR primes but generally sells at a modest price. Check the leaf shutter fires cleanly and evenly across speeds, and inspect the longer barrel for internal haze or fungus, which can accumulate in telephoto designs. Confirm the aperture is dry and responsive and that the mount and body coupling engage without play.