HD Pentax DA 21mm f/3.2 AL Limited Lens (Silver)

Model #21420

USA Version
Pentax 21420 1
Pentax 21420 1
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Dimensions (dxl) Approx. 2.5 x 1" (63.50 x 25.40 mm)
Filter thread Front: 49 mm
Weight 4.2 oz (119 g)


Camera mount type Pentax K
Diaphragm blades 7
Angle of view 68°
Groups/elements 5/8
Magnification 0.17x
Focal length 21 mm
Comparable 35mm Focal Length: 31.5 mm
Aperture Maximum: f/3.2
Minimum: f/22
Minimum focus distance 7.9" (20.07 cm)
Format compatibility Pentax Digital (APS-C)


Autofocus Yes
Expert Reviews
6 July 2014

This wide angle lens provides an angle of view equivalent to a 31.5mm lens on a 35mm format, when mounted on a Pentax Digital SLR. It costs around £590 and and is part of the premium Pentax Limited range.

User Reviews
B h photo.32817553
15 November 2014

i love the colors, sharpness and focal length, maybe my favorite DA Limited lens

  • +

    Consistent Output, Durable, Lightweight, Nice Bokeh, Strong Construction

  • -

    Lens Creep

Pentaxforums com.33034397
19 June 2015

This is the replacement to my much loved SMC version. Why? Well it was stolen amongst other camera gear recently and the insurance company replaced it with the updated HD version.

  • +

    Wonderful rendition, great colours, sharp!

  • -

    ever so slight CA

17 October 2014

I had the DA21mm for my K10D and it was a great lens. I sold it (for 80% of its value!) anticipating a jump to Canikon but ended up back with Pentax. I received the HD DA21mm today for my K3 and it is equal to or better than my original. Same build quality and form factor.

1 November 2010

Alot of people overlook this lens and go for the DA15 (which is another amazing lens), but this is a great way to fill the gap between 15 and 40. It's a great walk around lens for everyday use. If close-range street photography is your thing, then this lens will probably never leave your camera.

Product Highlights
  • Pentax K Mount
  • 31.5mm (35mm Equivalent)
  • Aperture Range: f/3.2 to f/22
  • Compact Pancake-Style Design
  • High-Grade Multi-Layer HD Coating
  • Super Protect Lens Coating
  • Quick-Shift Focus System
  • Seven-Blade Rounded Diaphragm
Average Expert Score
Average User Score
In The Box
  • Pentax HD Pentax DA 21mm f/3.2 AL Limited Lens (Silver)
  • Lens Cap
  • Metal Lens Hood
  • Rear Lens Cap (B) for Bayonet Mount Lenses
  • 70mm DA Soft Lens Case
  • Limited 1-Year Warranty
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