HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Black)

Model #23000

USA Version
Pentax 23000 1
Pentax 23000 1
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Specifications

Physical

Weight 9.98 oz (283 g)
Dimensions (DxL) Approx. 2.80 x 2.72" (71 x 69 mm)
Filter Thread Front:55 mm

Performance

Camera Mount Type Pentax K
Format Compatibility Pentax Digital (APS-C)
Angle of View 70° - 39°
Tilt/Shift None
Minimum Focus Distance 11.02" (28 cm)
Elements/Groups 9/8
Diaphragm Blades 9
Magnification 0.20x
Focal Length 20 - 40mm
Comparable 35mm Focal Length: 30.5 - 61.5 mm
Aperture Maximum: f/2.8 - 4
Minimum: f/22 - 32

Features

Autofocus Yes
Image Stabilization No
Tripod Collar No
Expert Reviews
Photodo.33034400
23 January 2014

This 2x zoom lens provides an angle of view equivalent to a 30.5-61.5mm lens on a 35mm format camera, when mounted on a Pentax Digital SLR, which is neither very wide, nor very telephoto.

Lenstip com.34355424
8 February 2014

I have no problems whatsoever with understanding the launch of such a lens as the Sigma A 18–35 mm f/1.8. I wouldn’t have such problems also in the case of a 20-40 mm fixed focus f/2.0 model.

  • +

    solid, stylish and sealed casing,, good image quality in the frame centre,, very good correction of the longitudinal chromatic aberration,, no reservations concerning the spherical aberration correction,, slight astigmatism,, very good work against bright light,, moderate vignetting,, accurate and...

  • -

    weak image quality on the edge of the frame near the maximum relative aperture,, lateral chromatic aberration at the shortest focal length could have been lower,, too slow autofocus,, a tad too pronounced coma,, average price/quality and price/parameters ratio.

Ephotozine.34750887
30 January 2014
7.0/10

As far as variable aperture standard zoom lenses go, this is one of the better ones as far as optical performance is concerned. Unfortunately, due to the price, it is easy to expect more from a lens like this.

  • +

    Very good sharpness in the centre at maximum aperture, Excellent sharpness when stopped down, Very good build, Weather resistant construction, Low CA, Retro styling

  • -

    Expensive for a variable aperture standard zoom, Odd zoom range is not really very wide, nor very telephoto, Neither focus or zoom are performed internally

User Reviews
Amazon.32817384
13 April 2016
10/10

Great single walking around lens. Finally, "Limited" build quality coupled with weather sealing. I favor all the small limited primes but always wished they were weather sealed like the "*" star lenses. The 20-40 covers all the standard focal lengths.

B h photo.32817553
5 April 2017
10/10

The limited series are not only compact, relatively light and render beautiful images.

B h photo.32817553
9 March 2017
10/10

Dream kit for hiking with the KP. Noticeably lighter, and as a person with some surgery-related limitations, I really appreciate the flexibility of this versus several primes and the light weight, especially for a WR lens. I think this with the KP will be an ideal hiking kit.

B h photo.32817553
27 December 2016
8.0/10

Bought it because of WR. Wasn't expecting so much CA even at lower ISOs.

Amazon.32817384
3 November 2016
10/10

Excellent sharp lens.

B h photo.32817553
23 August 2016
8.0/10

I use this Pentax 20-40 on my K5 due to it`s water seals. I read many reviews and was hesitant to purchase since there are quiet a few so,so reviews out there. Any way I`m glad I purchased ,the build quality is superb and the image quality is very good..no complaint :)

B h photo.32817553
22 June 2016
8.0/10

The Pentax DA 20-40mm Limited zoom delivers good image quality in a finely crafted metal body. AF is accurate, and relatively quick and silent. While large by Limited series standards (except for the FA 31mm Ltd), it still offers a fairly small and weather resistant package mated to the K-3.

B h photo.32817553
15 June 2016
10/10

Great clarity and tone. I expect to us it as my primary lens on an upcoming vacation.

B h photo.32817553
17 May 2016
10/10

At first I avoided buying this lens as I didn't think I would use the focal range as much to justify the price.I was so wrong.This is now my main lens and it has changed the way I approach scenes in my photography. I do mostly landscapes and shoot at f/8 - f/16 the majority of the time.

B h photo.32817553
5 April 2016
10/10

It replaced my 18-135mm WR as my carry around lens. It's light, sharp and beautifully designed. Works great on my wildflower photography...coupled with my Pentax K-3 it's a winner. I love the hood that comes with it...got mine in silver..

Product Highlights
  • Pentax K Mount
  • 30.5-61.5mm (35mm Equivalent)
  • Aperture Range: f/2.8-32
  • ED and Super-Low Dispersion Elements
  • High-Grade Multi-Layer HD Coating
  • Weather-Resistant Seals and SP Coating
  • Smooth & Quiet DC Auto Focus Motor
  • Quick-Shift Focus System
  • Rounded Nine-Blade Diaphragm
  • First Limited Series Zoom Lens
7.0/10
Average Expert Score
9.5/10
Average User Score
In The Box
  • Pentax HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Black)
  • Front Lens Cap
  • Rear Lens Cap
  • MH-RA55 Lens Hood
  • Lens Pouch
  • Limited 1-year Warranty
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