Bronica's 645 tele zoom — the leaf-shutter Zoom Zenzanon-PE 100-220mm f/4.8 for the ETR.
The Bronica Zoom Zenzanon-PE 100-220mm f/4.8 is a telephoto zoom lens for the Bronica ETR 6x4.5 medium-format system. It was one of the few zoom lenses offered for the ETRSi and belongs to the later PE generation of Zenzanon optics. Covering short to medium telephoto in one barrel, it gave ETR users flexibility unusual for medium format.
This manual-focus lens uses the Bronica ETR leaf-shutter mount and covers a zoom range of 100-220mm with a maximum aperture of f/4.8 across the range. It carries the in-lens Seiko leaf shutter shared by the ETR system, so flash synchronisation is available at all speeds. Its exact optical construction and physical dimensions are left out here rather than stated without confirmation.
The zoom range spans portrait through medium-telephoto focal lengths, letting a photographer reframe without changing lenses, which is a practical advantage on a system where lens swaps involve leaf-shutter optics. It suits portraits, landscape details and general subjects that benefit from variable reach. Being a medium-format zoom, it is a larger and heavier lens than the primes.
On the used market this zoom is relatively uncommon and, as a specialist optic, tends to be priced above the standard PE primes. Check the leaf shutter fires evenly at all speeds and test the zoom and focus movements for smoothness and lubricant drift. Inspect the internal elements for haze, fungus and separation, confirm the aperture is dry, and verify the mount couples securely to the body.