Lens Lab
    Porst Color Reflex Auto 50 mm f/ 1.7
    Porst Color Reflex Auto 50 mm f/ 1.7

    Porst Color Reflex Auto 50 mm f/ 1.7

    50mm · f/1.7

    Overview

    The Porst Color Reflex Auto 50mm f/1.7 is a fast standard prime for M42 mount, produced by Cosina and often sold as a kit lens. Optically, it is sharp wide open (Oldhand), but bokeh can be busy (doomed-forever). Build includes an auto-manual diaphragm switch and a metal push-on cap. It suits users seeking an affordable, sharp normal lens, though bokeh quality may not satisfy those prioritizing smooth backgrounds.