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

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Despite its compact size the HD PENTAX-D FA 28-105mm F3.5-5.6ED DC WR versatile zoom lens is designed to accommodate the image circle of a full-frame sensor, thanks to the use of state-of-the-art optics and high-performance optical elements.

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Product Code: 21297


Despite its compact, highly maneuverable body, the HD PENTAX-D FA 28-105mm F3.5-5.6 ED DC WR 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.

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.

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 glasoptical 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.

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:

  • Built-in DC motor to assure smooth, quiet, high-speed autofocus operation.
  • Rounded diaphragm with nine blades to produce a smooth, beautiful bokeh (defocus) effect, while minimizing the streaking effect of point light sources.
  • SP (Super Protect) Coating applied to the front surface of the lens to effectively repel water and grease.

Pentax HD PENTAX-D FA 28-105mm F3.5-5.6ED DC WR Lens Specifications:

Maximum aperture:
Minimum aperture:
Angle of view:
75° to 23.5° (Full Frame), 53° to 15.5° (APS-C).
Lens construction:
15 elements in 11 groups.
Minimum focus distance:
73mm x 86.5mm.
Filter size:
Included accessories:
Lens Hood PH-RBC62, Lens Cap O-LC62, Lens Mount Cap K.


Lens Mount Pentax K
Lens Type Standard Zoom
Focal Length 28-105mm
Aperture Type Variable
Maximum Aperture F3.5
Stabilised No
Filter Size 62mm
Warranty Period 2 Years


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