Pentax HD PENTAX-DA645 28-45mm f/4.5 ED AW SR Lens

Model: 26390

Pentax Warranty - USA Version
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MSRP: $4,999.95 ?


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General Information

Focal Length 28 - 45 mm
Aperture Maximum: f/4.5
Minimum: f/32
Camera Mount Pentax 645
Angle of View @ Infinity 89° - 63°
Minimum Focus Distance 1.31' (.4 m)
Diaphragm Blades 9
Elements/Groups 17/12
Magnification 0.21x
DOF Scale No
Distance Scale Yes
Autofocus Yes
Tripod Collar No
Movements None
Filter Thread Front: 82 mm
Weight 3.24 lb (1.47 kg)
Dimensions Approx. 3.90 x 5.96" (99 x 151.5 mm)
User Reviews
6 December 2014

Fantastic lens. This lens, combined with a 645z, is truly remarkable. I can see it serving well for capturing landscapes, but I use it for documentary. In low light, with the shake reduction enabled, I'm able to hand hold down to an 1/8th of a second at 6400 ISO and still have a print-worthy frame.

16 December 2014

Very useful all round wide lens, with very little distortion. Yes, its a big lens but it balances well on the camera. I use it mostly handheld and have been happy. The shake reduction really works and I am confident hand-holding this lens at slow shutter speeds.

19 September 2015

We bought this lens to use for interiors, landscapes and the like. Results from this lens, despite its enormous size are mediocre to okay. Distortion and focus fall are bearable but for this sort of money, just not good enough. Some of 20 year old glass for 1/10th the price overshadows this lens.

26 May 2016

I was using the 645z with this lens in Italy to photograph the interior of various basilicas. The weight caused me no end of difficulty shooting at lower iso. Even with the SR on, I found many out of focus shots.

17 January 2017

First off, this thing is big and heavy. It is as big as a 70-200 f2.8 and not for the weight weenies. Used hand held on a 645z body, it is big and heavy (7lbs) However it balances surprisingly well and with the help of SR delivers sharp images.

24 December 2016

I love it...It worked as SPECIFIED...

25 November 2016

Practically replaces the 25mm prime lens while offering more versatility without any discernible loss in image quality. The lens is large, heavier than most, has stabilization and wonderful lens coatings that offer an inherent circular polarizer benefit of sorts.

23 November 2016

Replaces the 25mm prime lens while offering more versatility without any practical loss in image quality. The lens is large, heavier than most, has stabilization and wonderful lens coatings that offer a sort off circular polarizer benefit.

30 December 2015

The Surface: I have long been a skeptic of using zooms over prime lenses almost entirely due to the fact that I have found better image quality in the latter 9.9/10 times while shooting.

Product Highlights
  • Pentax 645AF2 Mount
  • 22-35.5mm (35mm Equivalent)
  • Aperture Range: f/4.5 to f/32
  • Extra-Low Dispersion Elements
  • DC AF Motor & Quick-Shift Focus System
  • Shake Reduction, Image Stabilization
  • Super Protect, HD & Aero Bright Coatings
  • Dustproof and Weather-Resistant
  • Nine Blade Circular Diaphragm
  • Filter Thread: 82mm
In The Box
  • Pentax HD PENTAX-DA645 28-45mm f/4.5 ED AW SR Lens
  • Lens Cap
  • Mount Cap
  • PH-RBC82 Lens Hood
  • S120-210 Lens Case
  • Limited 1-Year Warranty
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