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Questions & Answers

Shopper : Why Did You Choose This?HAROLD T : It is considered to be one of the best lens for Pentax. It looks beautiful to me and I've wanted it for a while to complete my limited series collection.STEPHEN M : rented a copy of this years ago, loved it, just haven’t been able to afford it. and the silver is a solid 200 less than black, no-brainerJOHN B : Appears to be above average quality. The finish is striking on a red or black camera and the focus range is ideal as a standard lens on an APS-C sensor.CHRISTOPHER H : I needed a solid basic lens for family and other pictures. Also I like the silver colorVan W : I need it for close up pictures. Great price.JOHN D. A : I need a wide angle lens to do a dedication of a medical building.OMELYAN P : Good reviews, and lens has a good reputation.DANIEL M : Good range. Saw some samples on Pentax Forums which looked decent.

Reviews about this item

Review Summary

2022-01-05T11:35:30

Rated 5 out of 5

Fantastic lens.

I rate the lens outstanding. I rate the delivery a ?1?. The ?1? is not Adorama?s fault. I blame UPS. It was delivered out of the Secaucus, NJ UPS facility and that place is a dump. The box the lens came in was slightly crushed as was the main box Adorama shipped it in. I doubt seriously that Adorama would ever ship a box that was crushed to begin with. I used to drive OTR trucking and that UPS center is a nightmare. Thankfully, the lens is pristine and works beautifully. It?s well made and finished. If Adorama could do one thing, that would be to use another shipper.

DENNIS S.

2021-12-07T11:38:28

Rated 4 out of 5

A True Pentax Limited!

This lens is opticaly excellent. It's built like a tank. The focal length is a great for street photography. The color rendition is outstanding. The only drawback is the variable aperture.

Darryl L.

2021-09-17T10:55:06

Rated 5 out of 5

Pentax 20 - 40mm F- 2.8-4 Lens

Great lens. It's now my go to lens. The images are sharp and the colors are wonderful. I recommend this lens.

VAN W.

2021-09-03T10:42:43

Rated 5 out of 5

Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Zoom Lens - Silver

This a great lens! I can take great photo's using this lens. It is perfect for taking closeup's of flowers.

John A.

2021-07-23T11:49:14

Rated 4 out of 5

Pentac HD DA 20-40mm F 2.8/4 Limited DC WR Zoom len- Silver

It is good product

KIM L.

2021-05-27T11:53:29

Rated 5 out of 5

So far so good

So far so good

Barry C.

2019-02-15T11:17:22

Rated 5 out of 5

impressive lens

Agree with earlier reviewers in all regards. Extremely sharp and contrasty and as quiet as billed. CA and fringing on my copy is noticeable at the long end but easily corrected, and is surprisingly low at the short end, unlike my 16-50 DA* which has the worst CA at the short end. I'm not getting rid of the 16-50 (it's a very good specimen) but for travel or any time weight is an issue I will be happy to take the 20-40 instead.

LOUIS S.

2018-06-11T15:09:29

Rated 5 out of 5

A great lens which deserves it's "Limited" title

A great lens which deserves it's "Limited" title. While it is an apsc lens, it is capable of working on the full frame K-1. The metal build and weather sealing give this lens the quality expected of a Limited lens. This lens lives on my K3, and sees plenty of use on my K-1 as well.

Tony W.

2017-03-15T15:41:31

Rated 5 out of 5

Great niche lens

Quite the odd range, 20-40mm, and not the fastest lens in the universe, but for street photography it is quickly becoming my go-to lens. On the APS-C K-3 (which is what I use), 20mm=30mm full frame. This is a great length for street and events. The lens is very sharp, has beautiful color rendition, and very minor distortion/fringing (which is readily dealt with in Lightroom). It's also weather resistant, and I'm happy to now be able to go out in the rain and shoot. I put the lens on a Pz-1p film camera and did not notice any corner vignetting, so don't let the fact that it is a DA lens concern you too much...I'll have to run a roll of film through it to see what actual photos look like though.

Michael K.

2016-08-19T07:58:25

Rated 5 out of 5

Excellent lens

Excellent lens got it to replace my 16-45 mainly because of weather sealing but after using found it to be much sharper than my 16-45. Great color very light and small.

ERICK A.

2016-04-22T19:27:48

Rated 5 out of 5

It's a winner

This is a great lens for landscapes! Obviously it's not super wide at 20mm but it does perform within its zoom range. It's very sharp, and extremely well built. Images with this lens, shot on a K3, uprez very very well. I think it has to do with its color rendering and micro contrast. A great deal has been said about the sharp mages from the sigma 18 35, but for landscape where you are likely to be stopped down I believe this to be the better lens ..

William M.

2014-03-24T21:00:00

Rated 4 out of 5

good but overpriced

Bought this lens to replace my kit 18-55 WR lens when I'm hiking and other cases when I can carry only 1 lens and might need WR. The 20-40 is actually bigger in size than the 18-55 but not by much. I am mostly using it for landscapes. It has better contrast and colors than the 18-55 and might be sharper at the corners. I found I don't miss the extra range of 18-55. Overall, even if it produces better images the difference is not that big so I would not recommend this lens at the current price.

ASEN P.

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Pentax 20-40mm Specifications

General

General

Jump to...
  • Lens Mount

    Pentax K

  • Lens Format

    APS-C

  • Lens Type

    Wide Angle Zoom

  • Compatibility

    Pentax K-01, Pentax K-70, Pentax K-5 IIs, Pentax K-30, Pentax K-3 II, Pentax K-50, Pentax K-500, Pentax KP, Pentax K-S1, Pentax K-S2, Pentax KZ922, Pentax K-3, Pentax K-R

  • Lens Series

    Pentax DA

  • Kit Style

    Base

  • MPN

    23010

  • Color

    Silver

  • Focus Type

    Auto Focus

  • Closest Focus Distance

    11.02" / 28cm

  • Distance Information

    No

  • Built-In Motor

    No

  • Maximum Aperture

    f/2.8-4

  • Filter Size

    55mm

  • Angle Of View

    70° to 39°

  • 35mm Equivalent Focal Length

    30.5 to 61.5mm

  • Minimum Aperture

    f/22 to 32

  • Maximum Magnification

    0.2x

  • Aspherical Elements

    No

  • ED Glass Elements

    Yes

Features

Jump to...
  • Image Stabilization Type

    No

  • Tripod Collar

    Yes

  • Waterproof / Water Resistant

    No

  • Dust Resistant

    No

Construction

Jump to...
  • Lens Elements / Groups

    9 Elements in 8 Groups

  • Diaphragm Blades

    9

  • Weight

    9.98oz / 283g

  • Dimensions

    2.8 x 2.72" / 71 x 69mm

  • UPC Code

    027075274754

8 Accessories for Pentax HD DA 20-40mm f/2.8-4 ED Limited DC WR Lens - Silver

  • All Accessories (8)
  • Filters (2)
  • Bags & Cases (1)
  • Cap Leash (1)
  • Covers & Caps (1)
  • Lens Caps (1)
  • Cleaning Accessories (2)

About Pentax 20-40mm

FEATURED REVIEWS

impressive lens

By LOUIS S.

Agree with earlier reviewers in all regards. Extremely sharp and contrasty and as quiet as billed. CA and fringing on my copy is noticeable at the long end but easily corrected, and is surprisingly low at the short end, unlike my 16-50 DA* which has the worst CA at the short end. I'm not getting rid of the 16-50 (it's a very good specimen) but for travel or any time weight is an issue I will be happy to take the 20-40 instead.

A great lens which deserves it's "Limited" title

By Tony W.

A great lens which deserves it's "Limited" title. While it is an apsc lens, it is capable of working on the full frame K-1. The metal build and weather sealing give this lens the quality expected of a Limited lens. This lens lives on my K3, and sees plenty of use on my K-1 as well.

Under the banner of Pentax's commitment to quality and performance, the HD DA 20-40mm f/2.8-4 ED Limited DC WR Lens, in a sleek silver finish, is a versatile tool for photographers seeking to elevate their craft. Designed specifically for K-mount APS-C cameras, this high-quality standard length zoom lens offers a unique blend of wide-angle and standard-length photography capabilities.

The lens features an impressive 35mm focal length equivalency of 30.5-61.5mm, providing a broad range for capturing everything from expansive landscapes to intimate portraits. Its advanced optical design, which combines an ED (Extra-low Dispersion) glass and a super-low dispersion glass element, ensures clear, high-resolution images with edge-to-edge sharpness.

The Pentax-developed HD coating on the lens elements minimizes unwanted reflections, combating flare and ghosting for high-contrast images that resonate with realism. The in-lens direct current (DC) Auto Focus motor ensures smooth, quiet autofocus action, capturing moments with precision and finesse. For photographers who prefer manual control, the Quick-Shift Focus System allows for an instant switch from autofocus to manual focus mode.

Built for durability, this lens is the first in the "Limited" series to feature the PENTAX-original weather-resistant construction with seven special seals. The high-grade aluminum alloy barrel is designed to withstand various conditions, from a light drizzle to a dusty trail, ensuring your lens remains ready for the next shot.

The PENTAX SP (Super Protect) coating on the lens elements acts as a shield against everyday messes like water splashes, greasy fingerprints, or dust particles, keeping your lens clean and your images sharp. The lens's rounded nine-blade diaphragm at wide apertures delivers optimal optical performance and breathtaking bokeh effects, adding an artistic touch to your shots.

In summary, the Pentax HD DA 20-40mm lens is a testament to Pentax's dedication to delivering high-quality, reliable, and advanced photography equipment. Whether you're a seasoned professional or an aspiring photographer, this lens is a versatile and durable addition to your gear.

Pentax 20-40mm Features

  • Tailored for K-mount APS-C cameras
  • 35mm focal length equivalency of 30.5-61.5mm
  • Part of the esteemed Pentax Limited Series line
  • Durable, weather-sealed body construction
  • Advanced HD lens coating
  • Optical design includes an ED element and a super-low dispersion element
  • f/2.8-4 maximum aperture suitable for low light shooting
  • In-lens direct current (DC) motor ensuring quiet autofocus
  • Quick-Shift Focus System for rapid autofocus to manual focus transition
  • Lens barrel and hood made from high-grade aluminum alloy
  • Distinct distance and depth of field scales on the barrel
  • SP (Super Protect) coating repels dust, water, and grease
  • Seven weather-resistant seals safeguard against elements
  • Incorporates ED (Extra-low Dispersion) glass for high-resolution imagery

Key Features

  • Capture stunning images with the Pentax 20-40mm lens' exceptional image quality.
  • Enjoy versatile shooting with the 20-40mm focal length, perfect for portraits & landscapes.
  • The f/2.8-4 aperture range excels in low light, creating beautiful bokeh in your photos.
  • This Pentax DA lens is weather-resistant, ready for outdoor adventures and travel photography.
  • Experience fast, accurate autofocus, ensuring sharp images with this Pentax zoom lens.
  • Compact and lightweight design makes this 20-40mm lens ideal for everyday carry & street photos.

What's in the box:

  • Lens Cap O-LW65A (Silver)
  • Lens Hood MH-RA55 (Silver)
  • Rear Lens Cap B
  • Lens Soft Case P70-150