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

Model #21297

USA Version
Pentax 21297 1
Pentax 21297 1
Pentax 21297 5
Pentax 21297 4
Pentax 21297 3
Pentax 21297 2
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Weight 15.5 oz (439 g)
Dimensions (DxL) Approx. 2.87 x 3.41" (7.29 x 8.66 cm)
Filter Thread Front: 62 mm


Focal Length 28 - 105mm Comparable 35mm Equivalent on APS-C Format Focal Length: 43 - 161 mm
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Camera Mount Type Pentax K
Aperture Maximum: f/3.5 - 5.6Minimum: f/22 - 32
Diaphragm Blades 9, Rounded
Elements/Groups 15/11
Maximum Reproduction Ratio 1:4.5
Magnification 0.22x
Minimum Focus Distance 1.64' (50 cm)
Angle of View 15.5° - 53°APS-C Picture Angle: 23.5° - 75°


Autofocus Yes
Image Stabilization No
Tripod Collar No
User Reviews
B h photo.32817553
16 June 2016

This lens offers a nice zoom range and high quality optics. This lens compares with my Canon 24-105mm lens that I have been using for the past 10 years for zoom coverage. The Pentax lens in my opinion is crisper than my Canon lens. I have not found any negatives with this lens.

14 July 2016

Using this with Pentax K-1. There is plenty of reviews around of this lense, check them. My personal opinion: This is the best all-around and walk-around zoom choice for K-1 at this price. It is sharp "enough" from open to f16. The IQ is very good, the lens focuses fast, accurately and silently.

B h photo.32817553
17 February 2017

As others have said, this is a great walk-around lens to have on your camera. It's very easy to use, easy to carry and focuses quickly and quietly. When it comes to sharpness, however, the images it produces are a little soft; that's is the only issue keeping me from giving this 5 stars.

B h photo.32817553
9 December 2016

Knowing this to be a kit lens I did not expect too much from it. The surprise was that on the K-1 it does a good job through the entire zoom range. I shoot primes if it is really important but this is a great carry around lens.

B h photo.32817553
14 November 2016

Awesome lens, auto focus is quick and smooth. Lens hood stores on barrel for convenience.

B h photo.32817553
27 September 2016

i needed a wide angle lens that would also be good for portrait-kind photosi used while my first trip to USA.

B h photo.32817553
1 August 2016

I use it for routine photo outings, hiking, and trekking. Lightweight & Weatherproof, so good for hiking and trekking. It could be wider at the lower end and longer at the upper end but considering the light weight it is a very nice lens to have. Much lighter than the better Pentax 24-70

B h photo.32817553
27 July 2016

It arrived intact and seems to perform well with the K1. The zoom is a little stiff, but that's better than too loose. I don't notice any drop off in the corners and it focuses quickly. This will be a work horse for me.

14 July 2016

Excellent build quality and image quality when used with the K1 full frame.

14 July 2016

This lens has absolutely changed the quality of images I was getting with my K-3. Because the lens is made for the full frame K-1 it is heavy and large compared to many of the lenses I have specifically for the smaller sensor. The image and build quality far exceed the negative of the weight.

Product Highlights
  • K-Mount Lens/Full-Frame Format
  • Aperture Range: f/3.5-5.6 to f/22-32
  • ED Glass Elements
  • Super Protect & HD Multi-Layer Coatings
  • Supersonic Direct-Drive AF Motor
  • Quick-Shift Focus System
  • Minimum Focus Distance: 1.64'
  • Dust- and Weather-Resistant Design
  • 9-Blade Rounded Diaphragm
In The Box
  • Pentax HD PENTAX-D FA 28-105mm f/3.5-5.6 ED DC WR Lens
  • PH-RBC62 62mm Lens Hood for Pentax SMC DA 18-135MM f/3.5-5.6 ED AL (IF) DC WR Lens
  • O-LC62 62mm Lens Cap
  • Rear Lens Cap (B) for Bayonet Mount Lenses
  • Limited 1-Year Warranty
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