Lens Lab
    Olympus OM Zuiko 20 mm f/ 3.5 Macro
    Olympus OM Zuiko 20 mm f/ 3.5 Macro

    Olympus OM Zuiko 20 mm f/ 3.5 Macro

    20mm · f/3.5

    Overview

    The Olympus OM Zuiko 20mm f/3.5 Macro is a specialized bellows lens for magnifications from 4× to 12×, designed for extreme macro work. It features a continuously variable manual diaphragm with no click-stops, requiring stopped-down metering, and uses an RMS screw thread mount requiring an adapter. Build is dense brass. Optical performance is limited at very small effective apertures (e.g., f/58) but sufficient for web-sized images; focus stacking is recommended for higher quality. It suits dedicated macro photographers using bellows or extension tubes, not general use.