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|Dimensions (dxl)||Approx. 3.0 x 3.7" (7.62 x 9.40 cm)|
|Filter thread||67 mm|
|Weight||1.07 lb (485 g)|
|Focal length||17 - 70 mm
Comparable APS-C Focal Length: 25.5 - 105 mm
|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|
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.
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
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?
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...
Fantastic lense well made good in all light levels with F4 and water resistant too :-)
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. ......
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.
It has a constant large aperture/4 which is quite nice and the focal length can meet my daily need . I've heard that the focusing function is not so good, but as I tried, focusing is not bad.
I found I used it a lot in the studio and miss it now I've dropped it :( It's a little soft, but still very usable even for commercial work. I dropped mine from about 6 inches onto a laminate floor, which is fairly forgiving normally, but despite landing on the hood, something broke inside and that...
Bought as am "everyday" lens for a K30. The range is perfect ( approx.26 -105mm in old money) for the great majority of the shots I take and I therefore chose this lens over the 18-135 feeling that the loss of far end telephoto was a worthwhile trade off against the mixed reviews that that lens has...
This lens has a very versatile range, from 17-70. You may be put off by the f4 aperture, but it is pin sharp wide open, unlike the sigma 17-70 at f2.8 which is sloppy and soft. It has some weather sealing, not for storms but for light rain it will be sealed.