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smc PENTAX DA645 25mm F4 - Specifications

Product data
Article Number 26370
Release date Mar 23, 2012
Technical Specifications
Focal Length 25mm
Equivalent to 35mm format Equivalent to 19.5mm in 35mm format
Maximum aperture f/4
Minimum aperture f/32
Number of Diaphragm Blades 9
Fully Automatic diaphragm control
Angle of View 95°
Construction 12 Elements in 8 groups
Focusing Range 0.4m to infinity
Smallest object distance 189 mm (from the top of the attached hood)
Magnification Maximum 0.11x
Filter size 40.5mm (unable to attach on the lens front part)
Mount 645 AF2
Weight 1040g (37.7 oz.)
Lens cap: 50g (1.08 oz.)
    Dimensions (Length x Diameter) 90mm x 148,5mm (3.5 inch x 5.7 inch)
      Kit Content Lens Hood : Built-in (all-in-one type)
      Lens case S100-200
      Special metal front cover cap
      Rear lens cap
      2 exclusive filters (Normal and C-PL)
      NORMAL is shipped under built into lens
      Special Features Quick-Shift Focus System
      Aero Bright Coating
      SP (Super Protect) coating
      Rounded aperture (F4-F8)
      Dust proof, Water resistant (AW)
      AF is SDM only
      Optional Accessories

      In order to discover the products which are being developped and the ones which are planned, you can download our roadmap in pdf:

      To see our K-mount currently available range, please download Lenses & Accessories brochure.

      Visit the PENTAX Lens Technology web page to discover more about the PENTAX lens construction.

      Read more about the PENTAX Focus Function here.

      You can use the PENTAX Lens Glossary to learn more about its features.

      Want to know more about PENTAX lenses and how to choose the correct one ? Watch our video with professional photographer Kerrick James eplaining that there is a lens for every photographer by clicking here.

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