Lens Lab
    Sigma MF 28-85 mm f/ 3.5-4.5 MC Zoom Theta II
    Sigma MF 28-85 mm f/ 3.5-4.5 MC Zoom Theta II

    Sigma MF 28-85 mm f/ 3.5-4.5 MC Zoom Theta II

    28–85mm · f/3.5–4.5

    Overview

    The Sigma MF 28-85 mm f/3.5-4.5 MC Zoom Theta II is a vintage all-in-one zoom with solid metal build and smooth focusing, though the zoom ring is small and zoom creep is present (Hours of Idleness). Optically, it offers versatility but suffers from a variable aperture that requires adjustment when zooming, and distortion is typical at extremes. A notable caveat is a coating bubble on some copies, though it doesn't affect images. It suits film photographers seeking a compact walk-around lens, but handling and aperture quirks may frustrate.