Overview

The Mamiya-Sekor 180mm f/4.5 is a telephoto lens for Mamiya TLR systems, offering a roughly 100mm equivalent in 35mm. Optically, it delivers good sharpness and pleasing bokeh, with the later 'Super' version featuring a 5-element design for improved resolution. Weaknesses include a relatively slow f/4.5 aperture, limiting low-light use. Build is light but uses thin metal, and the lens can be tricky to mount on auto-cocking bodies, with risk of accidental shutter release. It suits daylight portrait and landscape photographers who value portability and unique rendering over speed.