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PENTAX-D HD FA 28-105mm F3.5-5.6 ED DC WR

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PENTAX-D HD FA 28-105mm F3.5-5.6 ED DC WR

A compact, lightweight standard zoom lens for use with PENTAX K-mount digital SLR cameras. It allows a high resolving power combined with outstanding manoeuvrability to be the perfect partner for the new PENTAX K-1.

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  • Despite its compact, highly maneuverable body, this versatile zoom lens is designed to accommodate the image circle of a large 35mm full-frame image sensor, thanks to the adoption of state-of-the-art optics and high-performance optical elements. When mounted on the PENTAX K-1 camera body, it delivers high-resolution imaging power, making it an ideal everyday-use lens for this new 35mm full-frame digital SLR camera.

    Main Features

    Standard zoom lens covering most frequently used ranges

    This standard zoom lens accommodates the image circle of a 35mm full-frame image sensor, and covers focal lengths between 28mm wide angle and 105mm medium telephoto. By incorporating the latest optics and a number of high-performance optical elements, it retains a sufficient brightness level even at edges of the image field, while effectively compensating for various aberrations. It delivers high-resolution images by optimizing the imaging power of the PENTAX K-1’s approximately 36.4 effective megapixels. Its compact, lightweight body and excellent cost performance make this lens a perfect regular lens for the PENTAX K-1.

    Excellent image description, complementing the full-frame digital SLR camera performance

    In its 15-element, 11-group optics, this zoom lens incorporates two high-precision aspherical optical elements, one ED (Extra-low Dispersion) glass optical element and one anomalous-dispersion glass optical element, to deliver bright, sharp images with minimal chromatic and spherical aberrations. Since its optics is designed to assure ample resolving power for the large, high-pixel image sensor, it produces well-defined, fine-detailed images.

    HD Coating to improve image description

    This lens is treated with the high-grade, multi-layer HD Coating.* Compared with conventional multi-layer coatings, this PENTAX-original coating assures higher light transmittance and less reflection to deliver bright, high-contrast images that are free of flare and ghost images, even under demanding lighting conditions such as backlight.

    * HD stands for High Definition.

    Quick-Shift Focus System

    This PENTAX-developed system allows for flawless, delay-free switching from autofocus to manual-focus operation, after the subject is captured in focus by the camera’s AF system.

    Weather-resistant construction

    This lens features a dependable weather-resistant construction with eight sealing parts to effectively prevent the intrusion of water into the lens interior. Paired with a weather-resistant PENTAX digital SLR camera body, it creates a durable, dependable digital imaging system that performs superbly in demanding shooting settings — even in rain or mist, or in locations prone to water splashing or spray.

    Other features

    ・SP (Super Protect) Coating applied to the front surface of the lens to effectively repel water and grease.

    ・Rounded diaphragm to produce a smooth, beautiful bokeh (defocus) effect, while minimizing the streaking effect of point light sources.

    ・Built-in DC motor to assure smooth, quiet, high-speed autofocus operation

  • Focal Length
    Focal length on APS-C sized sensor 43-161mm
    Maximum Aperture F3.5-F5.6
    Minimum Aperture  F22-F38
    Lens Construction
     15 elements in 11 groups
    Angle of View

    75-23.5° when attached to PENTAX 35mm full-frame SLR cameras,

    53-15.5° when attached to PENTAX APS-C size DSLR cameras

    Mount  KAF3
    Minimum Focusing Distance  0.5m
    Maximum Magnification  0.22x
    Filter Diameter
    Diaphragm Control  Fully automatic
    Number of Diaphragm Blades


    Rounded diaphragm (28mm: F3.5-6.3   105mm: F5.6-10)

     Maximum Diameter x Length

    approx. 86.5mm x 73.0mm


    approx. 440g / with hood approx. 463g

    Additional features

    HD Coating, SP (Super Protect) Coating

    WR (Weather Resistant)

    DC Motor

    Quick-shift Focus System

Additional Information

Box Contents: Lens Hood PH-RBC62, Lens Cap O-LC62, Lens Mount Cap K
Manufacturer Pentax
Model HD PENTAX-D FA 28-105mm F3.5-5.6 ED DC WR
MPN 21297