Bronica's 6x6 telephoto — the leaf-shutter Zenzanon-PS 200mm f/4.5 for the SQ system.
The Bronica Zenzanon-PS 200mm f/4.5 is a telephoto lens for the Bronica SQ 6x6 medium-format system. It belongs to the later PS generation of Zenzanon optics for the SQ-Ai era, which followed the earlier S lenses. On the square 6x6 frame a 200mm gives useful reach for distant and isolated subjects.
This manual-focus lens mounts on the Bronica SQ 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 SQ 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 6x6 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 PS 200mm is less common than the shorter PS 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 SQ body and film back.