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

Price: $999.95
Instant Savings: $323.00
You Pay: $676.95
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

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.
Performance
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
Elements/Groups 9/8
Diaphragm Blades 9
Features
Image Stabilization No
Autofocus Yes
Tripod Collar No
Environmental
Physical
Filter Thread Front:55 mm
Dimensions (DxL) Approx. 2.80 x 2.72" (71 x 69 mm)
Weight 9.98 oz (283 g)
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
  • REVIEW SNAPSHOT®

    by PowerReviews
    HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Silver)
     
    4.8

    (based on 8 reviews)

    Ratings Distribution

    • 5 Stars

       

      (6)

    • 4 Stars

       

      (2)

    • 3 Stars

       

      (0)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Strong construction (5)
    • Durable (4)
    • Fast / accurate auto-focus (4)
    • Consistent output (3)
    • Lightweight (3)

    Cons

      Best Uses

      • Landscape/scenery (5)
        • Reviewer Profile:
        • Semi-pro photographer (4)
        • Was this a gift?:
        • No (7)

      Reviewed by 8 customers

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      Displaying reviews 1-8

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      5.0

      Amazing lens

      By XyukonR

      from Whistler, BC, Canada

      About Me Photo Enthusiast

      Verified Buyer

      Pros

      • Durable
      • Fast / accurate auto-focus
      • Rugged
      • Strong Construction

      Cons

        Best Uses

        • Indoors/Low Light
        • Landscape/Scenery
        • Night Photography
        • Weddings/Events

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

        Well built, solid lens that takes amazing pictures. Have it mounted on my K-5 ii, and definitely a worthwhile upgrade from the kit lens. Will be my go to lens.

        • Was this a gift?:
        • No

        Share this review

        (3 of 3 customers found this review helpful)

         
        5.0

        Suoerb Lens!!!

        By Saltfly

        from North Myrtke Beach, S.C.

        About Me Semi-pro Photographer

        Verified Buyer

        Pros

          Cons

            Best Uses

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

              This lens is a must - very sharp throughout the range and focuses smoothly and easily. The first zoom that rivals Pentax primes.....I love it!

              • Was this a gift?:
              • No

              Share this review

              (4 of 4 customers found this review helpful)

               
              4.0

              Very Useful Lens

              By invertedhorm

              from Boston, MA

              About Me Semi-pro Photographer

              Pros

              • Consistent Output
              • Durable
              • Easily Interchangeable
              • Fast / accurate auto-focus
              • Lightweight
              • Nice Bokeh
              • Rugged
              • Strong Construction

              Cons

                Best Uses

                • Candid shots
                • Indoors Not Low Light
                • Landscape/Scenery
                • Outdoor
                • Outdoors

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

                I have been playing with this lens for about a week now.Having read the fairly lackluster online reviews, I really have to wonder if the reviewer(s) got bad copies of the lens. But in any case, it performs very well in the real world.The center sharpness is quite good wide-open at any zoom level. Stop it down to f/5.6, and everything is absolutely excellent.The HD coating is not just marketing: the anti-flare is really impressive. Combine that with the weather resistance, and you've got a great lens to run around with; wherever you want.Aside from the obvious outdoor uses, it works quite well as an indoor lens; especially paired with a flash unit. The zoom range is perfect for a room – and the compact/lightweight/rugged build is very practical for shooting in close quarters.Pros:- Excellent handling of flare- Good contrast, color- Nice bokeh (though somewhat limited by max. aperture)- Excellent lightweight build and compact size- Very nice auto focus (one of the best from Pentax lenses that I've seen, really)- Smooth zoom operation, very good manual focusCons:- Not constant f/2.8- Some room for improvement on corner resolution wide-open (but it is still a lot better than what the lab tests seem to suggest)I will grant that it is overpriced: at ~$, it gives more what I'd expect for $. But it is still a very good lens to own.

                • Was this a gift?:
                • No

                Share this review

                 
                5.0

                BOA LENTE

                By Eduardo

                from Rio de Janeiro, Brasil

                About Me Pro Photographer

                Verified Buyer

                Pros

                • Consistent Output
                • Durable
                • Easily Interchangeable
                • Fast / accurate auto-focus
                • Nice Bokeh
                • Strong Construction

                Cons

                • Weak Casing

                Best Uses

                • Landscape/Scenery

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

                BOA LENTE.CONSTRUÇÃO ROBUSTA

                • Was this a gift?:
                • No

                Share this review

                (2 of 2 customers found this review helpful)

                 
                5.0

                Very Nice Lens !!!

                By Dave

                from Delaware

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

                I'm very happy with this lens! It is sharp, focuses FAST and nearly SILENTLY. In 35mm equivalent, it covers about 30mm-60mm. And it's not much larger than an old-school fast 50. For my preferred style of shooting, it's like zooming from a 50, to a 35, and sort of near a 28. Which reminds me of the Leica Tri-Elmar ;). On my new K5 II, it makes for a very comfortable, quite and fast-handling package. And, of course, B&H is the best!

                Share this review

                (7 of 7 customers found this review helpful)

                 
                5.0

                Very good general purpose lens

                By Old Marine

                from Wilmington, NC

                About Me Semi-pro Photographer

                Verified Buyer

                Pros

                • Durable
                • Fast / accurate auto-focus
                • Lightweight
                • Strong Construction

                Cons

                  Best Uses

                  • General Purpose

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

                  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.

                  • Was this a gift?:
                  • No

                  Share this review

                  (3 of 4 customers found this review helpful)

                   
                  4.0

                  Good lens but poor quality control

                  By Joe

                  from Alaska

                  About Me Semi-pro Photographer

                  Verified Reviewer

                  Pros

                  • Good Image quality
                  • Strong Construction

                  Cons

                    Best Uses

                    • Landscape/Scenery

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

                    The first copy was badly decentered and had to be returned due to poor and erratic image quality. BH did a hassle-free exchange and the second copy was much better, being quite sharp at f/5.6 across the entire frame except for one extreme corner at 20mm. Build quality was superlative although the included lens hood is not very useful.Overall, the only real drawback is apparently poor quality control by Pentax despite the high cost of this lens.

                    • Was this a gift?:
                    • No

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                    (7 of 7 customers found this review helpful)

                     
                    5.0

                    A prime replacer.

                    By kcg

                    from Pleasanton, CA

                    About Me Photo Enthusiast

                    Verified Buyer

                    Pros

                    • Colors
                    • Consistent Output
                    • Contrast
                    • Lightweight
                    • Nice Bokeh
                    • Sharpness

                    Cons

                      Best Uses

                      • Landscape/Scenery
                      • Weddings/Events

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

                      Replaced 3 DA Limited primes. Super sharp wide open and consistent across the frame. Lightweight, WR, Metal construction. Definitely worthy of the LTD designation. Has wonderful bokeh and the great colors, contrast of the DA LTD primes. Autofocus is silent

                      • Was this a gift?:
                      • No

                      Share this review

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