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

BH #PE204028B • MFR #23000
Pentax HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Black)
Key Features
  • Pentax K Mount
  • 30.5-61.5mm (35mm Equivalent)
  • Aperture Range: f/2.8-32
  • ED and Super-Low Dispersion Elements
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.
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Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Overview

  • 1Description
  • 230.5 to 61.5mm Focal Length Equivalency and f/2.8 Maximum Aperture
  • 3HD Lens Coating
  • 4DC Autofocus Motor
  • 5Quick-Shift Focus System
  • 6Weather-Resistant Construction and Durable Aluminum Barrel
  • 7SP Lens Coating
  • 8Optical Design
  • 9Rounded Diaphragm Blades

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

Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Specs

Focal Length
20 to 40mm (35mm Equivalent: 30.5 to 61.5mm)
Maximum Aperture
f/2.8 to 4
Minimum Aperture
f/22 to 32
Lens Mount
Pentax K
Lens Format Coverage
APS-C
Angle of View
70° to 39°
Minimum Focus Distance
11.02" / 28 cm
Maximum Magnification
0.2x
Optical Design
9 Elements in 8 Groups
Diaphragm Blades
9
Focus Type
Autofocus
Image Stabilization
No
Filter Size
55 mm (Front)
Dimensions (ø x L)
2.8 x 2.72" / 71 x 69 mm
Weight
9.98 oz / 283 g
Packaging Info
Package Weight
1.095 lb
Box Dimensions (LxWxH)
6.5 x 4 x 3.9"

Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Reviews

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Can you use this lens on the full frame K1? Will ...

Can you use this lens on the full frame K1? Will it have a 20mm-40mm focal length?
Asked by: Stephen
The Pentax DA 20-40mm F/2.8-4 ED is designed for crop sensor cameras and would vignette when used on full frame sensor camera such as the K1.
Answered by: Dan
Date published: 2023-06-28

Can I still put a 55mm filter and attach the lens ...

Can I still put a 55mm filter and attach the lens hood that comes with it?
Asked by: Fredricke
Yes you can attach a 55mm threaded filter to the Pentax HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Black) and the hood it comes with. But only if the filter has 55mm front threads to attach the hood too.
Answered by: Robert
Date published: 2023-10-09

What is the clip-on cap size when using the hood? ...

What is the clip-on cap size when using the hood? Want to replace the push-on cap.
Asked by: Steven
The only caps we have for the Pentax HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Black) fit on the lens not the hood. Like these, https://bhpho.to/43YMlhm .
Answered by: Robert
Date published: 2023-06-25

I already own the Ltd's-DA15, DA21, ...

I already own the Ltd's-DA15, DA21, &DA40-realistically will this replace could this replace those lenses?
Asked by: Dave
This is a nice versatile lens , I don't think it should replace fixed lenses
Answered by: vilson
Date published: 2021-02-16

Does it come with caps

Does it come with caps
Asked by: John
Yes, the Pentax HD Pentax DA 20-40mm f/2.8-4 ED comes with both front and rear lens caps.
Answered by: hectorm
Date published: 2023-06-20

question

than the black version differs from silver?
Asked by: Alexey K.
no difference in the performance just the color. An excellent lens, you will be pleased with this purchase
Answered by: John G.
Date published: 2018-08-25

question

compatible with Pentax KP?
Asked by: Anonymous
Yes
Answered by: MARILIN S.
Date published: 2018-08-25

question

compatible with k-5iis?
Asked by: Anonymous
Yes, works with all K-5 models.
Answered by: PHILIP T.
Date published: 2018-08-25
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