Lens Lab
    SMC Pentax-M 28 mm f/ 3.5
    SMC Pentax-M 28 mm f/ 3.5

    SMC Pentax-M 28 mm f/ 3.5

    28mm · f/3.5

    Overview

    The SMC Pentax-M 28mm f/3.5 is a compact, all-metal lens offering classic Pentax color and contrast. It is surprisingly sharp when stopped down to f/5.6–f/11, but suffers from appreciable field curvature, yielding softer corners compared to the K version. Build quality is high with smooth handling, though the focus ring direction may be unfamiliar. It suits photographers seeking a small, affordable wide-angle for deliberate manual focus on film or mirrorless cameras.