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

SKU: PX2040AFDAB MFR: 23000
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Includes Free Gift ($2.91 Value)

SINDA8255
Sirui 55mm Lens Thread to NDH100-82 Filter Holder Adapter Ring

Key Features

  • Capture stunning images with the Pentax 20-40mm lens, perfect for everyday photography.
  • Enjoy versatile shooting with this wide angle to standard zoom lens, ideal for landscapes.
  • Experience exceptional image quality with ED glass elements that reduce chromatic aberration.
  • The Pentax DA lens boasts a weather-resistant build, ensuring durability in various conditions.
  • Achieve sharp, clear photos with the fast f/2.8-4 aperture, great for low-light situations.
  • Compact and lightweight design makes this 20-40mm lens a fantastic travel companion.
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Q&A

Questions & Answers

Shopper : Why Did You Choose This?KEITH F : Looks like a very good entry level lens for Pentax SLRGLENN J G : I have a K-20D, with a DA* 50-135. I'm traveling soon and wanted a short zoom to compliment my longer lens. the new DA*16-135 is not compatible with my camera, and this is WR. After reading the reviews here and on other sites, I decided to give it a go.PAUL R : After reading the reviews I believe it will meet my needs and also upgrade the lenses that I have to choose from in my camera bag.Dennis S : I wanted a high quality zoom lens in this particular range of focal lengths.Barry C : After extensive Review research I decided on this lens to go with my K-70LAWRENCE P : High qJONATHAN M H : Limited build quality AND WR?!? Could potentially replace the 21, 35 and 40 Limiteds in my bag with a single lens, with weather resistance (I live in the rainy PNW). This lens, the 15 f4 LTD for really wide and the 55-300 PLM WR should make a versatile kit with my KP.STEVEN H : good middle of the road focal length and weather resistance.Jorge F : I needed a small street/walk-around lens for my Pentax KP, I already have a couple of limited lenses and they are small, well made, with very good image quality and worth the money. And this one is weather resist. The adorama black Friday deal was too good to let go!

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.

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

  • Lens Series

    Pentax DA

  • Kit Style

    Base

  • MPN

    23000

  • Color

    Black

  • 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

    027075274747

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

  • All Accessories (8)
  • Filters (2)
  • Cap Leash (1)
  • Bags & Cases (1)
  • Covers & Caps (1)
  • Lens Caps (1)
  • Cleaning Accessories (2)
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Compatibility--Pentax K-1, Pentax K-1 Mark II
Special Features--Weather Resistant
Kit StyleBaseBaseBase
Lens TypeWide Angle ZoomWide Angle ZoomWide Angle Zoom
Filter Size55mmNo Thread82mm
Fixed Focal LengthNANANA
Lens MountPentax KPentax KPentax K
Maximum Aperturef/2.8-4f/3.5-4.5f/2.8

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.

Make your photography journey more rewarding with the Pentax HD DA 20-40mm f/2.8-4 ED Limited DC WR Lens, a high-performance lens in a sleek black finish. Designed specifically for K-mount APS-C cameras, this superior standard length zoom lens enhances your photography skills, bringing you closer to professional-grade imagery.

Experience the versatility of the lens with its 35mm focal length equivalency of 30.5-61.5mm. This range provides a comprehensive scope for capturing everything from expansive landscapes to detailed portrait shots. It's like having the flexibility of wide-angle and standard-length photography combined into one exceptional lens.

Pentax's high-end optical design incorporates an ED (Extra-low Dispersion) glass and a super-low dispersion glass element. This sophisticated optical design delivers clear, high-resolution images with edge-to-edge sharpness, ensuring every detail is captured, regardless of its location within your frame.

The Pentax-developed HD coating revolutionizes your photography experience by eliminating unwanted reflections. This superior, multi-layer coating combats flare and ghosting, enabling you to capture high-contrast images that are rich in realism.

The in-lens direct current (DC) Auto Focus motor is the silent force behind each crisp shot. It's not just about capturing the moment; it's about doing it with precision. This lens offers smooth, quiet autofocus action, ensuring you never miss those fleeting moments. For those who prefer control, the Quick-Shift Focus System allows for an instant switch from autofocus to manual focus mode.

Built for the adventurous photographer, this lens features seven special seals, making it the first in the "Limited" series to boast the PENTAX-original weather-resistant construction. Whether you're shooting in a drizzle or on a dusty trail, the high-grade aluminum alloy barrel ensures your lens remains protected and ready for the next shot.

The PENTAX SP (Super Protect) coating on the lens elements acts as a shield against everyday messes. From water splashes and greasy fingerprints to dust particles, this coating ensures your lens stays clean and your images remain sharp.

Create artistic shots with impeccable bokeh thanks to the lens's rounded nine-blade diaphragm at wide apertures. This feature delivers optimal optical performance and breathtaking bokeh effects, making your subject stand out even more.

From its innovative optical design to its robust build, the Pentax HD DA 20-40mm lens exemplifies Pentax's dedication to quality and performance.

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, perfect for everyday photography.
  • Enjoy versatile shooting with this wide angle to standard zoom lens, ideal for landscapes.
  • Experience exceptional image quality with ED glass elements that reduce chromatic aberration.
  • The Pentax DA lens boasts a weather-resistant build, ensuring durability in various conditions.
  • Achieve sharp, clear photos with the fast f/2.8-4 aperture, great for low-light situations.
  • Compact and lightweight design makes this 20-40mm lens a fantastic travel companion.

What's in the box:

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