Pentax Introduces New 25mm f4 Wide-Angle Lens For Its 645 System

Pentax has announced the introduction of a new super wide-angle lens for their 645 medium format system, with the particularly long official designation “smc Pentax D FA 645 25mm f/4 AL (IF) SDM AW”. On the 645D, Pentax’s digital medium format camera, the lens offers an angle-of-view corresponding to that of a 19.5mm lens on 35mm full-frame—that’s quite wide! Mounted to a film-based 645 body (to which it is compatible as well), it gets even wider: 15mm-equivalent. The lens that was originally scheduled for sale in summer 2011 comes with full weather sealing, dual aspherical lenses and a circular polarizer filter.

Besides Pentax’ proprietary Aero Bright and Super Protection lens coatings, the new DA645 25mm f/4 lens features a supersonic SDM autofocus motor, rounded aperture blades for pleasing bokeh and an internal filter holder with a thread size of 40.5mm. The lens’ full specs read as follows:

  • Focal length: 25mm
  • Angle-of-view (when mounted on the 645D camera): 95°
  • 12 lens elements in 8 groups (two aspherical elements)
  • Min. / max. aperture: f4 / f32
  • Min. focusing distance: 1.31 ft (4o cm)
  • Max. magnification: 0.11x
  • Weight: 36.7 oz (1040 g)
  • Size (diameter x length): 3.5 x 5.8 in (90 x 148.5 mm)
  • Coatings: Aero Bright Coating for improved performance in backlight situations and SP (Super Protect) coating to repel dust, water and grease
  • All Weather lens fully sealed against dust and water

The D FA 645 25mm f/4 lens is available for pre-order now, with shipping estimated for mid-May. The price? A mere US-$ 4.999,95! That’s quite a chunk of money, for quite a chunk of glass!

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