Mamiya's long telephoto for the RZ67 — the 250mm f/4.5 W for medium format wildlife and portraits.
The Mamiya Sekor Z 250mm f/4.5 W is a long telephoto for the Mamiya RZ67 medium format system. On the 6x7 format, 250mm provides approximately a 125mm equivalent — a classic portrait-to-telephoto perspective with significant compression. The W designation indicates wider image circle coverage for the RZ67's rotating back system.
Optical performance is good. Sharpness is very good when stopped down with the tonal depth of 6x7 medium format. The longer focal length on medium format creates significant background compression and subject isolation. Built-in leaf shutter enables flash synchronisation at all speeds. The large image circle covers the full 6x7 negative with room for the rotating back.
Mamiya RZ mount with integrated leaf shutter. Filter thread is 77mm. Weight is approximately 810 grams — substantial. Build quality is professional grade. Manual focus with the RZ67's bellows system. The leaf shutter adds weight but provides invaluable flash sync capability at all speeds for studio and location flash work.
Available on the used market at moderate prices. Check leaf shutter operation and clean optics. A useful long telephoto for the RZ67 system. The 125mm equivalent provides more compression and isolation than the 180mm. Best suited to studio portraiture and carefully planned outdoor work given the system's considerable weight.