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

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

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PRODUCT ENQUIRY
  • 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
Brand: Pentax   |    Code: 00ZPX20-40F2.8-4

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.

HD coating

This coating reduces the reflection rate up to 50% more than the conventional coating (compared to PENTAX multicoating) for reduced flare and ghosting even under backlighting and other adverse conditions where strong point light sources can enter the lens.

Round iris diaphragm

A 9-blade, round iris diaphragm is used. This enables natural reproduction of illumination and other scenes and softer out-of-focus (bokeh) effects for making the subject stand out more prominently from the background.

ED (Extra-low Dispersion) Glass/Anomalous Dispersion Glass

ED (Extra-low Dispersion) Glass and Anomalous Dispersion Glass are used to minimize color blurring over the entire zoom range and even at the edges of the image for providing superior resolution.

Internal lens motor AF

For the first time, the Limited series now uses a DC motor inside the lens barrel for providing a focusing mechanism. Compared to body AF, this focusing mechanism provides a quieter drive sound and smoother AF operation.

Weather-resistant construction

Photography when exposed to water or sudden rainfalls A weather-resistant construction is used for overcoming adverse conditions. The focus ring and zoom ring also have a weather-resistant design for preventing the entry of water.

Machined Aluminum Material

The lens barrel, cap, and hood use a machined aluminum material. You will feel the presence and elegance of the Limited series whenever you look at or touch this lens

 

Performance

Focal Length

20 to 40mm
Comparable 35mm Focal Length: 30.5 to 61.5 mm

Aperture

Maximum: f/2.8 to 4
Minimum: f/22 to 32

Lens Mount

Pentax K

Format Compatibility

Pentax Digital (APS-C)

Angle of View

70° to 39°

Tilt/Shift

None

Minimum Focus Distance

11.02" / 28 cm

Maximum Magnification

0.2x

Maximum Reproduction Ratio

1:5

Optical Design

9 Elements in 8 Groups

Diaphragm Blades

9

Image Stabilization

No

Autofocus Yes
Tripod Collar No

Physical

Filter Thread

Front: 55 mm

Dimensions (DxL)

71 x 69 mm

Weight

283 g

 

  • Pentax HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Silver / Black)
  • Front Lens Cap
  • Rear Lens Cap
  • MH-RA55 Lens Hood
  • Lens Pouch
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OVERVIEW

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.

HD coating

This coating reduces the reflection rate up to 50% more than the conventional coating (compared to PENTAX multicoating) for reduced flare and ghosting even under backlighting and other adverse conditions where strong point light sources can enter the lens.

Round iris diaphragm

A 9-blade, round iris diaphragm is used. This enables natural reproduction of illumination and other scenes and softer out-of-focus (bokeh) effects for making the subject stand out more prominently from the background.

ED (Extra-low Dispersion) Glass/Anomalous Dispersion Glass

ED (Extra-low Dispersion) Glass and Anomalous Dispersion Glass are used to minimize color blurring over the entire zoom range and even at the edges of the image for providing superior resolution.

Internal lens motor AF

For the first time, the Limited series now uses a DC motor inside the lens barrel for providing a focusing mechanism. Compared to body AF, this focusing mechanism provides a quieter drive sound and smoother AF operation.

Weather-resistant construction

Photography when exposed to water or sudden rainfalls A weather-resistant construction is used for overcoming adverse conditions. The focus ring and zoom ring also have a weather-resistant design for preventing the entry of water.

Machined Aluminum Material

The lens barrel, cap, and hood use a machined aluminum material. You will feel the presence and elegance of the Limited series whenever you look at or touch this lens

 

SPECIFICATIONS

Performance

Focal Length

20 to 40mm
Comparable 35mm Focal Length: 30.5 to 61.5 mm

Aperture

Maximum: f/2.8 to 4
Minimum: f/22 to 32

Lens Mount

Pentax K

Format Compatibility

Pentax Digital (APS-C)

Angle of View

70° to 39°

Tilt/Shift

None

Minimum Focus Distance

11.02" / 28 cm

Maximum Magnification

0.2x

Maximum Reproduction Ratio

1:5

Optical Design

9 Elements in 8 Groups

Diaphragm Blades

9

Image Stabilization

No

Autofocus Yes
Tripod Collar No

Physical

Filter Thread

Front: 55 mm

Dimensions (DxL)

71 x 69 mm

Weight

283 g

 

IN THE BOX

  • Pentax HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens (Silver / Black)
  • Front Lens Cap
  • Rear Lens Cap
  • MH-RA55 Lens Hood
  • Lens Pouch