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

The Pentax DA 20-40mm f/2.8-4 ED Limited DC WR is a 20–40mm f/2.8 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

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

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

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Lens Overview — Pentax DA 20-40mm f/2.8-4 ED Limited DC WR

The HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Zoom Lens is a standard-range zoom lens designed specifically for APS-C format DSLR cameras using the Pentax K mount. Covering a focal length range of 20mm to 40mm, it offers versatility across a variety of shooting situations, from moderately wide compositions to standard perspectives. The lens supports both autofocus and manual focus operation, giving shooters the flexibility to switch between focusing modes as the situation demands.

With a maximum aperture that opens to f/2.8 at the wide end and narrows to f/4 at the telephoto end, the lens provides reasonable light-gathering capability throughout its zoom range. Weighing in at just 283g, it is a notably compact and lightweight option for everyday carry, making it well-suited to photographers who prioritize portability without sacrificing a versatile zoom range. The 55mm filter thread is a practical size that allows for straightforward use of common filters.

As an APS-C format lens built for Pentax K mount DSLRs, it is a focused, purpose-built tool for Pentax shooters looking for a compact standard zoom that fits naturally into the Limited lens lineup.

Key Features — Pentax DA 20-40mm f/2.8-4 ED Limited DC WR

20-40mm APS-C Zoom Range: Covers 31-62mm full-frame equivalent, spanning moderately wide to standard perspectives in a single lens.

f/2.8-4 Variable Aperture: Opens to f/2.8 at the wide end for improved light gathering and subject separation in tighter conditions.

HD Lens Coating: Pentax's HD multi-layer coating reduces flare and ghosting for improved contrast and color fidelity.

Weather-Resistant Construction: WR sealing protects against dust and moisture, allowing confident use in adverse outdoor conditions.

Limited Series Build Quality: Part of Pentax's premium Limited lineup, featuring a compact metal construction with refined fit and finish.

DC Autofocus Motor: Internal DC motor drives quiet and smooth autofocus, well-suited to both stills and video capture.

Lens Specifications — Pentax DA 20-40mm f/2.8-4 ED Limited DC WR

Pentax DA 20-40mm f/2.8-4 ED Limited DC WR full specifications
SpecDetail
Use CasesTravel
Lens TypeZoom
FormatAPS-C
Zoom/PrimeZoom
Focal Length20–40mm
Maximum Aperturef/2.8
Camera SystemDSLR
Lens MountPentax K
AutofocusYes
Focus TypeAuto, Manual
Image StabilizationNone
Filter Thread55mm

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

The HD Pentax DA 20-40mm zoom lens is purpose-built for APS-C format DSLRs using the Pentax K mount, offering a practical standard zoom range that suits a wide variety of photographic subjects. With a variable maximum aperture of f/2.8 at 20mm narrowing to f/4 at 40mm, it delivers solid light-gathering performance across the zoom range. The lens supports both autofocus and manual focus, ensuring flexibility in operation whether you're shooting fast-moving subjects or fine-tuning focus manually.

At just 283g, it is impressively compact for a zoom lens, making it an easy companion for travel, street photography, or everyday use. The 55mm filter thread allows for straightforward attachment of popular filter types. With no image stabilization on board, photographers will want to be mindful of shutter speed in lower light conditions.

Overall, this is a well-specified compact zoom tailored specifically for Pentax K mount APS-C shooters.

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

  • ✓Lightweight at just 283g, making it easy to carry for extended shooting sessions
  • ✓Supports both autofocus and manual focus, offering flexible operation
  • ✓Focal length range of 20-40mm covers wide to standard perspectives on APS-C

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

  • ✗No image stabilization, which may be a drawback in low-light handheld shooting
  • ✗Maximum aperture narrows to f/4 at the 40mm end, limiting light intake at telephoto
  • ✗APS-C format restricts compatibility to crop-sensor Pentax K mount bodies only

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

What's the big deal with the Pentax 20-40mm Limited lens? — snappiness

Resources & Downloads — Pentax DA 20-40mm f/2.8-4 ED Limited DC WR

Manuals & Guides

Frequently Asked Questions — Pentax DA 20-40mm f/2.8-4 ED Limited DC WR

What camera mount does this lens fit?+
This lens is designed for the Pentax K mount. It is built for APS-C format DSLR cameras within the Pentax K mount system.
Does this lens have image stabilization?+
No, image stabilization is listed as None in the specifications. Shooters relying on stabilization will need to depend on any in-body stabilization their camera may offer.
What is the maximum aperture of this lens?+
The lens has a variable maximum aperture, with f/2.8 at the 20mm wide end and f/4 at the 40mm telephoto end. This is typical for zoom lenses in this category.
Does this lens support autofocus?+
Yes, the lens supports autofocus as well as manual focus. Both focus modes are available, giving users flexibility depending on their shooting scenario.
What filter size does this lens use?+
The lens has a 55mm filter thread, a widely available size that is compatible with a broad range of standard filters such as UV, polarizing, and ND options.
How heavy is this lens?+
The lens weighs 283g, making it one of the lighter zoom options available for APS-C DSLR systems and well-suited for everyday or travel use.

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