Lens Lab
    Sigma MF 100-200 mm f/ 4.5 Zoom-Kappa
    Sigma MF 100-200 mm f/ 4.5 Zoom-Kappa

    Sigma MF 100-200 mm f/ 4.5 Zoom-Kappa

    100–200mm · f/4.5

    Overview

    The Sigma MF 100-200 mm f/4.5 Zoom-Kappa is a vintage telephoto zoom with all-metal build and smooth focusing, though the zoom ring is small and zoom creep is present. It has a variable aperture that requires adjusting when zooming past 80mm, which can be cumbersome. Optical quality is functional, with no noticeable mold, but a coating bubble was noted on one sample, possibly indicating era quality control issues. It suits users comfortable with manual operation and seeking a compact, all-metal telephoto zoom for film or digital.