Lens Lab
    Voigtlander Ultron AF 100-400 mm f/ 4.5-6.7
    Voigtlander Ultron AF 100-400 mm f/ 4.5-6.7

    Voigtlander Ultron AF 100-400 mm f/ 4.5-6.7

    100–400mm · f/4.5–6.7

    Overview

    The Voigtlander Ultron AF 100-400 mm f/4.5-6.7 is a telephoto zoom lens for 35mm SLR cameras. Optically, it can produce nice pictures with adequate sharpening, though it requires post-processing. Weaknesses include slow autofocus and a tendency for the focus group to get stuck on some copies. Build and handling are typical for its class. It suits amateur photographers exploring the 100-400mm range who are comfortable shooting at f/9-f/11.