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

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

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

B&H # PE204028B MFR # 23000
More on the Way
Expected availability: 7-10 business days

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
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Color: Black

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

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Pentax 20-40mm f/2.8-4.0 overview

  • 1Description

The black HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens from Pentax is a high performance standard length zoom lens for K-mount APS-C cameras. Its 35mm focal length equivalency is 30.5-61.5mm providing a versatile and practical range for wide-angle to standard length shooting. It is the first zoom lens in the Pentax Limited Series line and brings with it a durable, weather-sealed body, HD lens coating and an optical design consisting of one ED element and one super-low dispersion element.

The f/2.8-4 maximum aperture enables effective low light shooting and, at the wide-angle end, control over its shallow depth of field for images that place sharp focus on the subject with a pleasing out of focus background. An in-lens direct current (DC) focus motor provides smooth and quiet autofocus action and its Quick-Shift Focus System enables rapid shift from autofocus to manual focus mode.

The lens barrel and the included hood are made from high-grade aluminum alloy, distance and depth of field scales are clearly marked on the barrel and a smooth rotating, knurled ring provides manual focus control. SP (Super Protect) coating on the front and rear lens elements repels dust, water and grease to help maintain peak performance.

30.5 to 61.5mm Focal Length Equivalency and f/2.8 Maximum Aperture
With its 2x zoom coverage of 20-40mm, this lens offers focal length coverage from 30.5 to 61.5mm in the 35mm format when mounted on a PENTAX K-series DSLR. This covers a practical set of frequently used focal lengths and is ideal as a versatile everyday lens. Its maximum aperture of f/2.8 at the wide-angle end of the zoom is effective in low light and provides shallow depth of field focus.
HD Lens Coating
This lens has been treated with the PENTAX-developed HD coating, a high grade, multi-layer coating that reduces unwanted reflection, allowing the user to capture high-contrast images free of flare and ghosting.
DC Autofocus Motor
Shoot discreetly with in-lens, direct current (DC) Auto Focus motor operation for smooth & quiet performance.
Quick-Shift Focus System
The Quick-Shift Focus System allows instant switching from autofocus to manual focus operation.
Weather-Resistant Construction and Durable Aluminum Barrel
With seven special seals to prevent intrusion of water, moisture and dust, this is the first lens of the "Limited" series to feature the PENTAX-original weather-resistant construction. With a handsome and durable aluminum alloy barrel and weather-sealing, this lens is able to perform in almost any shooting condition.
SP Lens Coating
The PENTAX SP (Super Protect) coating on the front and rear lens elements repels dust, water and grease to keep your lens clean and your images sharp.
Optical Design
The ED (Extra-low Dispersion) glass and a super-low dispersion glass element in this lens' optics deliver clear, high resolution imagery with edge-to-edge sharpness, throughout the entire zoom range.
Rounded Diaphragm Blades
Enhanced with a rounded nine-blade diaphragm at the wide apertures for optimal optical performance and gorgeous bokeh effects.
UPC: 027075274747
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
  • Table of Contents
    • 1Description

    Pentax 20-40mm f/2.8-4.0 specs

    Focal Length 20 - 40mm
    Comparable 35mm Focal Length: 30.5 - 61.5 mm
    Aperture Maximum: f/2.8 - 4
    Minimum: f/22 - 32
    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
    Magnification 0.20x
    Maximum Reproduction Ratio 1:5
    Optical Design 9 Elements in 8 Groups
    Diaphragm Blades 9
    Image Stabilization No
    Autofocus Yes
    Tripod Collar No
    Filter Thread Front: 55 mm
    Dimensions (DxL) 2.80 x 2.72" / 71 x 69 mm
    Weight 9.98 oz / 283 g
    Packaging Info
    Package Weight 1.15 lb
    Box Dimensions (LxWxH) 6.1 x 3.8 x 3.7"

    Pentax 20-40mm f/2.8-4.0 reviews

    HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Black) is rated 4.8 out of 5 by 38.
    Rated 5 out of 5 by from Incredible! 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. I just can't get over how sharp and beautiful the quality of the pictures are with this lens! The build quality is outstanding, making it a joy to use. My main kit employs a HD 15mm Limited and a 100mm Macro WR... and this lens fills in the gap in the range I NOW photograph in more. I will never regret purchasing this lens... and I will never let it go.
    Date published: 2016-05-17
    Rated 5 out of 5 by from Surprise -- a great lens for environmental portraits I purchase this lens to duplicate my pentax 35-70mm for years ago. Ended up using it for everything in those days. I wanted the same capability for my K-3. Plus weather resistance was a big plus. I will keep my 21mm and 35mm da lenses though. In short, the 20-40 is a joy to use. The surprising thing to me is how well I like taking photos of people with it. The 2.8 - 4 keeps the eyes and head in focus. For an environmental portrait, you aren't trying to blur the background that much. No, it doesn't do what my Canon f1.2 L does. What is does though is pretty swell.
    Date published: 2015-12-15
    Rated 5 out of 5 by from Zoom lens for a primarily-prime photographer I admit I have a strong preference for prime lenses. I've been a Pentaxian since the 80s, and while I've had many zooms, I've never loved any of them. This one is different. Images are pleasing, despite minor compromises that other reviewers cover well. It is small enough to be a go-anywhere lens and is surprisingly light and well-balanced on the camera (K-3). Autofocus is adequate. That's even true for candid shots if you preset the focus with the distance scale before raising the camera to eye (remember that old skill from the days of manual focus?). All-in-all, it's a keeper.
    Date published: 2017-03-26
    Rated 5 out of 5 by from For picky shooters This lens trails competitors in lots of technically measurable ways - the speed, the edge sharpness, the overall zoom range, etc. But for photographers who value instruments as much as the results they produce, this thing is unbeatable. The craftsmanship and quality of the assembly and design is reminiscent of the great German optical instrument manufacturers, and the overall look of the images the lens produces is obviously very curated. The emphasis is on producing images that look balanced and natural more than making sure that a 4x zoom range or constant f/2 aperture is technically attainable. For all these reasons (and because also how it looks) this lens is very retro in it's overall lasting impression. For anyone who grew up shooting film and using equipment from the 70s and 80s, owning this lens will be really special.
    Date published: 2015-02-13
    Rated 5 out of 5 by from Pentax Rules! The Pentax 20-40mm 2.8-4.0 zoom lens is remarkable. I keep it on my K3 the majority of the time. It has made my 31mm Pentax (*****) lens spend a lot more time in my equipment bag even with its wider 1:1.8 aperture. I use it as my primary lens and am very impressed and satisfied with it's performance. I was caught in a downpour and with the WR rating a micro fiber towel and lens cloth was all I needed to get back into action. In one word AWESOME!
    Date published: 2015-01-13
    Rated 5 out of 5 by from Very good general purpose lens I'm a confirmed Nikon-ite, but I purchased a K-3 system simply because I wanted a good camera to use on rainy days, and my D-800 isn't going out in the rain! This lens seems to be the best made of the Pentax WR lenses and is certainly quieter relative to auto-focus. It takes in a lot of light and so far I've encountered no negatives to report. Focus is sharp to the edges, and with a 35mm equivalent of 31-62mm, it fills that niche between wide-angle landscapes and portraits.
    Date published: 2014-03-24
    Rated 5 out of 5 by from Smooth, sharp top quality design Gorgeous saturation; sharper than anything I've mounted on my K-3 thus far. On paper 20-40 seemed an odd range, but thanks to great B&H price, I went for it. Thankfully 20-40 does not disappoint! Motor is quiet; a solid chunk of metal but not heavy. Stellar quality glass, with a balanced and smooth feel. Love the old school numerics and scale too. My K-3 and I have a new friend. I hope Pentax will consider moving this technology into their purple fringe 10-17 zoom!
    Date published: 2015-05-31
    Rated 5 out of 5 by from Outstanding lens I had originally decided to buy the Sigma 18 x 35 lens, but decided at the last moment to buy the Pentax 20 x 40 HD lens. The professional on lines reviews were less than stellar, but actual users seemed to like the lens so with much hesitation I decided to make the purchase. After using this lens for two days, I can say without question this lens is outstanding. While it is true the edges may be a little soft wide open, but it is tack sharp at F4 and beyond. Color is amazing tooreminds me of days gone by when I was shooting with Fuji film. This lens matches perfectly with my K3 and the build is every bit as solid as the camera. If you are on the fence about buying this lens because of on-line reviews, forget the so called professional and buy this lens. You will not be disappointed with the quality, price and performance. By the way, B&H customer service is amazing. I had a problem getting my gift card to work and their representative took care of the issue within minutes. Two major thumbs up!!!
    Date published: 2014-12-24
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    Pentax 20-40mm f/2.8-4.0 Q&A

    Pentax 20-40mm f/2.8-4.0 accessories

    Designed for use with:

    • Pentax K-3 II
    • Pentax K-70
    • Pentax K-S2
    • Pentax KP
    See any errors on this page? Let us know.