Mamiya's telephoto for the 645 system — the Sekor N 210mm for medium format portrait and wildlife work.
The Mamiya Sekor N 210mm f/4 is a telephoto prime for the Mamiya 645 medium format system. On the 645 format, 210mm provides approximately a 130mm equivalent perspective — a useful telephoto for portraits, wildlife, and compressed landscape compositions. The N designation indicates the newer optical version designed for the Mamiya 645 Pro and Super bodies.
Optical performance is good for medium format. Sharpness is very good when stopped down, with the resolution advantage of the 645 format producing detailed, tonally rich images. The f/4 aperture provides reasonable depth of field separation on the larger format. Bokeh is smooth. The longer telephoto perspective on medium format gives a distinctive look not easily replicated on smaller formats.
Mamiya 645 mount. Filter thread is 58mm. Weight is approximately 580 grams — moderate for a medium format telephoto. Build quality is solid professional grade. Manual focus with a smooth helicoid. No leaf shutter — uses the camera's focal plane shutter. Compatible with Mamiya 645 Pro, Super, and later bodies.
Available on the used market at reasonable prices — Mamiya 645 equipment offers excellent value for medium format. Check for smooth focus operation and clean optics. A useful telephoto for the 645 system. The 150mm f/3.5 is the more popular portrait choice, while the 210mm provides additional reach for wildlife and compressed perspectives.