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Product Highlights
  • f/3.5 - f/32 Aperture Range
  • 15/11 (Elements/Groups)
  • Full-Frame Format
  • DC Direct Current Motor
  • Weather Resistant
  • Pentax K Mount
Pentax HD Pentax-D FA 28-105mm f/3.5-5.6 ED DC WR Lens Pentax HD Pentax-D FA 28-105mm f/3.5-...
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Pentax-D FA

28-105mm f/3.5-5.6 ED DC WR Lens

Compatible with full-frame K-mount DSLRs, the compact HD PENTAX-D FA 28-105mm f/3.5-5.6 ED DC WR Lens from Pentax is highly versatile, offering a wide-angle to medium telephoto range. The lens also features an f/3.5-5.6 variable aperture to help keep size down while also utilizing ED glass elements to reduce aberrations.

This compact, lightweight, standard zoom lens provides the most frequently requested focal-length range for general photography. Ranging from wide angle to medium telephoto, it’s designed to accommodate the image circle of the large full-frame image sensor, incorporating 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, suitable for a variety of scenes, from landscape to street photography to portraits.


  • 3.8x zoom with wide to mid-telephoto range
  • Weather Resistant construction
  • DC Motor for fast, silent AF operation
  • Quick Shift focus system
  • HD Coating
  • SP Coating

Standard zoom lens covering most frequently-used range

This standard zoom lens accommodates the image circle of a full-frame image sensor, and covers focal lengths between 28mm wide angle to 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 aberrations. It delivers high-resolution images by optimizing the imaging power of the PENTAX K-1’s 36MP sensor. Its compact, lightweight design and excellent cost performance make this lens a perfect companion lens to the PENTAX K-1.

Excellent image resolution, complementing the PENTAX K-1 full-frame performance

With 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. The optics are designed to deliver ample resolving power for the large, high-pixel image sensor, producing well-defined, fine-detailed images.

HD Coating to improve image description

This lens is treated with the high-grade, multi-layer HD (High Definition) 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.

Additional 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

What's Included

D FA 28-105mm f/3.5-5.6 ED DC WR Lens
PH-RBC62 62mm Lens Hood
O-LC62 62mm Lens Cap
Rear Lens Cap (B) for Bayonet Mount Lenses
Limited 1-Year Warranty


Product Specifications

D FA 28-105mm


Focal Length 28 - 105 mm
Comparable 35mm Equivalent on APS-C Format
Aperture Maximum: f/3.5 - 5.6
Minimum: f/22 - 32
Camera Mount Type Pentax K 
Format Compatibility 35mm Film / Full-Frame Digital Sensor 
Angle of View 15.5° - 53°
APS-C Picture Angle: 23.5° - 75°
Minimum Focus Distance 1.64' (50 cm) 
Magnification 0.22x 
Maximum Reproduction Ratio 1:4.5 
Elements/Groups 15/11 
Diaphragm Blades 9, Rounded 


Image Stabilization No 
Autofocus Yes 
Tripod Collar No 


Filter Thread Front: 62 mm
Dimensions (DxL) Approx. 7.29 x 8.66 cm (2.87 x 3.41")
Weight 439 g (15.5 oz)

Questions & Answers

Pentax HD Pentax-D FA 28-105mm f/3.5-5.6 ED DC WR Lens

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