Lens Lab
    Beroflex 400 mm f/ 6.3
    Beroflex 400 mm f/ 6.3

    Beroflex 400 mm f/ 6.3

    400mm · f/6.3

    Overview

    The Beroflex 400mm f/6.3 is a vintage manual-focus telephoto lens with an M42 mount, requiring an adapter for modern cameras. Optically, it can produce sharp images when focus is nailed, but the narrow depth of field at f/6.3 makes focusing challenging, especially for fast-moving subjects. Build quality is typical of 1960s lenses, solid but lacking modern features like image stabilization. It suits photographers comfortable with fully manual operation and willing to work around its limitations for retro character or budget telephoto reach.