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Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR

Model: 21740

Pentax Warranty - USA Version
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Specifications

Physical

Dimensions (dxl) Approx. 3.0 x 3.7" (7.62 x 9.40 cm)
Filter thread 67 mm
Weight 1.07 lb (485 g)

Performance

Focal length 17 - 70 mm
Comparable APS-C Focal Length: 25.5 - 105 mm
Magnification 0.31x
Aperture Maximum: f/4
Minimum: f/22
Minimum focus distance 11.04" (28.04 cm)
Format compatibility Pentax Digital (APS-C)
Camera mount type Pentax K
Angle of view 79° - 23°
Maximum reproduction ratio 1:3.22
Groups/elements 12/17
Diaphragm blades 7

Features

Image stabilization No
Tripod collar No
Autofocus Yes
Expert Reviews
Pop photo.32824722
10 February 2010

Pentax describes the 17-70mm f/4 lens as a “standard lens with extra zoom,” a cute catch phrase. But “standard zooms,” as they’re called, are one of the most popular lens groups.

Ephotozine.34750887
5 January 2016
7.0/10

The lens is a very good performer in many ways, with just a couple of weak areas as mentioned, designed with the central performance given priority. The questions to ask revolve around whether or not lenses from the same range that have wider ranges, sometimes better sharpness, faster focusing and...

  • +

    Very good central sharpness, Excellent central CA control, Focuses very close, QuickShift focusing available, Silent AF, Constant aperture design

  • -

    Lower edge sharpness, CA at edges at 17mm, AF not the fastest, No weather resistance

User Reviews
16 February 2017
10/10

I bought my DA 17-70 used about 4 years ago. I have used it often during that time on a K20 and K30 body without any SDM issues. Maybe I have been lucky or maybe the failures are actually the exception, who knows?

2 June 2015
4.0/10

I did purchase this lens in 2010. This image quality is very nice but I did replace the SDM 2 times since. I probably should have purchase the sigma but... I must agree with the fact that pentax should recall all those SDM lens and find a real fix because this is not good for a reputation.Pentax K5...

28 November 2013
2.0/10

This Focal length is ideal for the kind of photos that I take which is why I purchased it. Now I may have gotten a bad one but it's auto focusing has never been satisfactory and then the motor died. I have used the lens on K20 and K5II bodies with the same results. ......

9 November 2013
2.0/10

Let me start by saying I'm a big Pentax fan. I've owned 3 camera bodies and own 7 different Pentax lenses. Great equipment but the SDM motors on these lenses have been an utter failure. The fanboys and Pentax PR people will tell you the issue has been fixed but don't believe it.

Product Highlights
  • Zoom Super Wide-Telephoto
In The Box
  • Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR
  • 67mm Lens Cap
  • Rear Lens Cap
  • PH-RBM67 Lens Hood for the SMCP-DA 17-70mm f/4 AL (IF) Lens
  • 1-Year Warranty
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