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Pentax 20-40mm F/2.8-4 HD DA ED Limited DC WR Black K Mount Autofocus Lens For APS-C Sensor DSLRS {55}

Pentax Cameras
KEH Model# 364733

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Pentax 20-40mm F/2.8-4 HD DA ED Limited DC WR Black K Mount Autofocus Lens For APS-C Sensor DSLRS {55} Description


Equipped with Pentax's most advanced optical technology - the HD Pentax DA 20-40mm ED Limited DC WR offers flexible focal length and versatile settings while unleashing your creativity. The HD Pentax DA 20-40mm ED Limited DC WR lens offers Pentax's weather sealed body with HD coating to protect against rain and dust. The lens has nine elements in eight groups with one extra low dispersion lens element, SP coating, fast f/2.8 aperture with nine rounded diaphragm blades producing a striking bokeh for exceptional visual expression, DC (in-lens direct current) focus motor ensuring quiet and smooth autofocus. It's 20-40mm focal length is equivalent to 305 - 61.5mm focal length in 35mm format. The HD Pentax DA 20-40mm ED Limited DC WR lens provides versatile and standard wide-angle shooting.

This model is the first zoom lens of the high-grade Limited Lens series, which is renowned for its exceptional visual description, distinctive appearance and meticulous finish in every detail. It features a two-times zoom range covering focal lengths from moderate wide angle to standard, and a large maximum aperture of F2.8 at its wide-angle end. In addition to the state-of-the-art HD coating and completely round-shaped diaphragm, it also comes equipped with a weather-resistant construction for the first time in the Limited Lens series, and a smooth, quiet AF system driven by a lens-installed AF motor, to capture beautiful, high-quality images, even under demanding weather and environmental conditions.

KEH Specifications

  • Focal Length: 24-40mm
  • Aperture Maximum: f/2.8 - f/4
  • Aperture Minimum: f/22 - f/32
  • Camera Mount Type: Pentax K with APS-C sensor
  • Minimum Focus Distance: 0.28m (0.9')
  • Elements/Groups: 9/8
  • Angle of View: 70-39°
  • Autofocus: Yes
  • Tripod Collar: No
  • Filter Thread: 55mm
  • Dimensions: Approx. 2.80 x 2.72"
  • Weight: Approx. 10.0 oz
  • Manufacturer Part#: 23000


General information

Manufacturer Part Number 23000
Manufacture GTIN 4549212274749
Brand Name Pentax
Product information
Minimum Focus Distance
Lens Construction
9 Elements in 8 Groups
Product Model
Pentax Cameras:
  • K10
  • K100
  • K110
  • K20
  • K200
  • K-3
  • K-30
  • K-5
  • K-5 II
  • K-5 IIs
  • K-50
  • K-500
  • K-7
  • K-m
  • K-r
  • K-x
  • *ist D
Minimum Aperture
Minimum Angle of View
Maximum Angle of View
Optical Zoom
Maximum Aperture Wide
Maximum Aperture Tele
  • Black
  • Camera
Lens Type Wide to Standard Zoom

Technical Information

Zoom Min Focal Length 20.0000
Zoom Max Focal Length 40.0000
Max Aperture f/2.8-4

Physical Characteristics

Lens Mount Pentax KAF2 (SMC-DA, SMC-DFA)