Pentax-D FA 645 55mm f/2.8 AL[IF] SDM AW Lens

Model #26350

USA Version
Pentax d 26350 1
Pentax d 26350 1
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General Information

Focal Length 55 mm
Aperture Maximum: f/2.8
Minimum: f/22
Camera Mount Pentax 645
Angle of View @ Infinity 65°
Minimum Focus Distance 1.64' (49.99 cm)
Diaphragm Blades 9
Elements/Groups 9/7
Magnification 0.17x
DOF Scale Yes
Distance Scale Yes
PC Outlet No
Autofocus Yes
Tripod Collar No
Filter Thread Front: 67 mm
Weight 14.67 oz (416 g)
Dimensions Approx. 2.69 x 3.20" (68.2 x 81.3 mm)
User Reviews
B h photo.34921152
15 November 2016

Used with a 645z, the weather sealing and light weight make this an awesome performer in inclement weather. Fantastic contrast, sharpness and bokeh.

15 May 2018

Exceptionally good lens. I test images based on the default raw processing settings of DXO Photolab, and this lens is in their database, so distortion and lateral color are automatically corrected. I tested this on a 645z.

  • +

    Surgically sharp without being harsh

  • -


1 June 2013

Spectacular lens. Extremely sharp on the Pentax 645Z, great contrast, and small footprint. Great grip. Little to no flare, even shooting directly into the sun. Only minor quibble is that there is some purple fringing against bright light. Fantastic value.

1 week ago

I am used to using a 45mm pancake Zeiss on my contax 35mm which is my preferred lens for portability and super sharpness. I recently purchased this to complement longer focal length lens I normally use with my pentax medium format.

  • +

    Great wide angle

26 June 2017

I am using on K-1 with cheap Chinese adapter, which is all you need because the expensive adapters provide no more functionality, although I wish my adapter had a tripod socket to allow tripod use with the heavier 645 lenses.

  • +

    Sharpness, smooth rendering, ease of focussing.

  • -


13 October 2016

I just carefully examined the optical performance of three copies of the 55 D-FA lens on a 645Z body. By any traditional, fussy standard, all three copies were exceptionally fine lenses, in my tests being essentially perfect from corner to corner from f/5.6 on up.

  • +

    Superb overall optical performance from 5.6

  • -

    Not quite up to wide-open star capture work, hard to focus for wide open at infinity

17 August 2016

This is a really good lens. I was nervous about buying one because reviews are not unambiguously positive, and it's not spoken of much outside this forum. I'm glad I took the chance. I wanted something faster and lighter than my fantastic 45-85/4.5 SMC Pentax-A 645 zoom. This fits the bill.

  • +

    Well built, reliable, sharp

  • -

    A bit heavier than I'd like...

B h photo.34921152
19 May 2016

I really don't understand all the great reviews . This lens is sharp in the center and very soft in the corners and edges, even stopped down to f8. Also a fair bit of distortion . I was really shocked and dissapointed by how poorly it performs .

B h photo.34921152
15 February 2016

its perfect for the new 645z. the weight is awesome for the quality.

31 January 2016

Great lens and the second most used lens in my kit. Great image quality, and well balanced on the 645z.

  • +

    Great Performer & Lightweight

  • -

    None that I can find

Product Highlights
  • Standard Lens Equivalent to 43.5mm
  • Dustproof and Weather-Resistant
  • Aero Bright Coating to Prevent Flare
  • Rounded Diaphragm for Beautiful Bokeh
  • Smooth, Quiet SDM Autofocus
  • SP Coating Blocks Dust and Dirt
  • Advanced Focus Options
In The Box
  • Pentax-D FA 645 55mm f/2.8 AL[IF] SDM AW Lens
  • Front and Rear Lens Caps
  • Lens Hood
  • Limited 1-Year Warranty
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