HD Pentax-D FA 28-105mm F3.5-5.6 Announced

New full frame "kit lens" for the Pentax K-1

By PF Staff in Pentax Announcements on Feb 17, 2016
HD Pentax-D FA 28-105mm F3.5-5.6 Announced

The HD Pentax-D FA 28-105mm F3.5-5.6 ED DC WR joins the Pentax lineup today as an affordable walkaround zoom lens option for the Pentax K-1 full frame.  The role of this moderately light and compact lens can be compared to that the prolific 18-55mm kit lens for APS-C, though the 28-105mm offers more reach at the long end.

From a physical standpoint, the D FA 28-105mm strongly resembles the design of the DA 18-135mm zoom lens.

It is available for pre-order in the US for a reasonable price of $499; interestingly the same as the MSRP of the aforementioned lens.

D FA 28-105mm Key Specifications

Image Format Full frame / 35mm film
Angle of View (Diag/Horiz) APS-C: 53-15.5 ° / 46-13 °
Full frame: 75-23.5 ° / 65-19 °
Optical Formula 15 elements in 11 groups
Max Magnification 0.22x
Min. Focusing Distance 50 cm
Aperture Ring No
Aperture Blades 9, rounded
Aperture Range F3.5-22 (W) to F5.6-38 (T)
Quick Shift Yes
Internal Focusing Yes
Autofocus Type In-lens DC motor
Lens Mount Pentax K (KAF3)
Filter Size 62mm
Weather Sealing
Dimensions (WxHxD) 73 x 86.5 mm (2.9 x 3.4 in.)
440 g (15.5 oz.)
US Launch Price $499

Full specifications for the Pentax D FA 28-105mm can be found in our lens database.

Product Photos

Click on either thumbnail to enlarge.

Press Release

February 18, 2016

HD PENTAX-D FA 28-105mm F3.5-5.6ED DC WR
A compact, lightweight standard zoom lens
for use with PENTAX K-mount digital SLR cameras:
high resolving power combined with outstanding maneuverability
to be the perfect partner for the new PENTAX K-1

RICOH IMAGING COMPANY, LTD. is pleased to announce the launch of the HD PENTAX-D FA FA 28-105mm F3.5-5.6ED DC WR. This new compact, lightweight standard zoom lens provides a focal-length range from wide angle to medium telephoto.

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

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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

Note: Designs and specifications are subject to change without notice.




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