Lens Lab
    SMC Pentax-A 645 150 mm f/ 3.5
    SMC Pentax-A 645 150 mm f/ 3.5

    SMC Pentax-A 645 150 mm f/ 3.5

    150mm · f/3.5

    Overview

    The SMC Pentax-A 645 150mm f/3.5 is a manual-focus medium telephoto lens praised for excellent sharpness even wide open and good contrast. It has minimal distortion and moderate falloff at f/3.5. Build quality is solid with a smooth focus ring and a retractable metal hood with rubber bumper. However, it uses external focusing and some find the 1980s plastic and loose hood less satisfying. It is a compact, affordable option for landscape and portrait photographers who prioritize size and manual control.