Pentax Telephoto 55mm f/1.4 DA* SDM Autofocus Lens for Digital SLR


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    The Pentax 55mm f/1.4 DA* SDM Autofocus Lens is a compact and bright short-telephoto lens of the highest order, made exclusively for Pentax digital SLR cameras.  In a stocky housing ready for harsh conditions, you’ll get a bright f/1.4 aperture-worlds away from the experience you’re used to with more common zooms-that opens up new creative doors to you as a photographer.
    This lens was born to shoot between f/1.4 and f/2.8, and comes with a 9-bladed aperture diaphragm which shows up as perfectly round when you stay between f/1.4-2.8.  Shoot dramatic portraits with bright point light sources behind the subject, and you’ll be dazzled with lovely diffuse, circular out-of-focus highlights that make everybody look better.  Beyond portraits, this lens works well any time you would use a moderate telephoto focal length.
    The focusing system of this lens is SDM only; there is no screw on the rear of the lens barrel to have the AF driven by a body-based motor.  This allows the lens to move incredibly quick, driven by an internal motor and with the Quick-Shift system providing manual override capacity to you any time you want it with no buttons to switch; but you’ll need a Pentax body which allows SDM autofocus (all current Pentax bodies support SDM, but the *IST series does not).
    Note: Does NOT provide autofocus upon non-SDM-enabled Pentax cameras.

    • Brilliantly-sharp portrait lens which gathers plenty of light
    • Completely-rounded aperture diaphragm from f/1.4-2.8 for beautiful out-of-focus highlights
    • Speedy SDM autofocus motor provides fast, silent response with Quick-Shift full-time manual override
    • Pentax’s unique SP water and dirt-repelling coating on both external surfaces
    • Pentax’s “Aero Bright” internal lens yields high transmissivity and reduced flare
    • Dust and moisture-resistant housing
    • Essentially equivalent to an 82.5mm f/1.4 lens upon 35mm SLR cameras
    Package Weight 1.45 lbs
    Package Dimensions 5.7 x 4.9 x 4.3 in
    Camera Mount Type

    Pentax K

    Package Weight

    1.45 lb






    Maximum: f/1.4 Minimum: f/22

    Dimensions (DxL)

    Approx. 2.8 x 2.6″ (7.11 x 6.60 cm)

    Format Compatibility

    Pentax Digital (APS-C)

    Maximum Reproduction Ratio


    Box Dimensions (LxWxH)

    5.7 x 4.9 x 4.3″


    13.23 oz (375 g)

    Image Stabilization


    Angle of View


    Tripod Collar




    Minimum Focus Distance

    1.48′ (45 cm)

    Diaphragm Blades


    Filter Thread

    58 mm

    Focal Length

    55mm Comparable 35mm Equivalent on APS-C Format Focal Length: 82.5 mm


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