Lens Lab
    SMC Pentax-M 28-50 mm f/ 3.5-4.5
    SMC Pentax-M 28-50 mm f/ 3.5-4.5

    SMC Pentax-M 28-50 mm f/ 3.5-4.5

    28–50mm · f/3.5–4.5

    Overview

    The SMC Pentax-M 28-50mm f/3.5-4.5 is a compact, all-metal zoom lens with classic Pentax color and contrast. It is surprisingly sharp, especially stopped down from f/5.6–f/11. The lens works well on modern mirrorless cameras via a K-mount adapter, making it suitable for slow, deliberate manual-focus stills and cinematic video. However, buyers should check optics, aperture movement, and focus ring when purchasing second-hand. It suits photographers who appreciate vintage build and are willing to work within its moderate aperture range.