Lens Lab
    Pentax SMC 135mm f/3.5
    Pentax SMC 135mm f/3.5

    Pentax SMC 135mm f/3.5

    135mm · f/3.5

    Overview

    The SMC Pentax-M 135mm f/3.5 is a compact, lightweight lens with a 5-element design. Optically, it is usable wide open at f/3.5, with slight improvement at f/4 and excellent performance from f/5.6 to f/16. It holds its ground against faster siblings at smaller apertures. Build quality is good, with 49mm filter threads. It suits budget-conscious Pentax users seeking a portable telephoto for film or digital.