Lens Lab
    Sigma-XQ MF 39-80 mm f/ 3.5 Multi-Coated
    Sigma-XQ MF 39-80 mm f/ 3.5 Multi-Coated

    Sigma-XQ MF 39-80 mm f/ 3.5 Multi-Coated

    38–80mm · f/3.5

    Overview

    The Sigma-XQ MF 39-80mm f/3.5 Multi-Coated is a 1970s all-metal zoom with a constant f/3.5 aperture and macro capability up to 1:3.5. Optically, it is inconsistent: sharp at f/5.6 but glows wide open, with poor bokeh described as 'dog hair'. Build is tank-like with metal and glass, but it is large and heavy. The macro feature is cumbersome, requiring two hands or a tripod. It suits vintage lens enthusiasts who value solid construction and can work around its quirks, but not those seeking modern optical performance.