Pentax 17-70mm f/4 DA SMC AL IF SDM Lens for Pentax Digital SLR Cameras
Technical Details

    Equivalent focal length of 26-107mm in 35mm format, when used with digital SLR cameras.
    ED and aspherical elements compensate for chromatic and spherical aberration.
    The image circle of the lens has been created to match the smaller image recording area of digital SLR cameras.
    The Quick-Shift Focus System allows to instantly shift to manual focus once the subject is captured by AF.
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