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04-07-2013, 07:36 PM   #1
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K01 and Sigma 17-70 version 1

Does anybody have experience with the Sigma 17-70 f2.8-4.5 (version 1) on the K01? I was wondering if the k01 can drive the screw mount version of the lens adequately.

Thanks

04-07-2013, 08:14 PM   #2
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Yes, this lens - although was there more than one version of the 2.8-4.5? - works fine for me. It's taken the majority of my shots over the last 3 months. With firmware 1.03, it focuses (fairly) quickly and accurately, although it will, once in a while, just completely miss-focus. This tends to happen when focus is at or near infinity and more often at the long end of the range (50-70mm).
04-08-2013, 03:25 AM   #3
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I think there was only one version of the 2.8-4.5, and it is a screw mount. Thanks for the feedback.
04-14-2013, 10:52 AM   #4
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I have one of these 17-70/2.8-4.5 and it does NOT focus properly on my K01!

04-14-2013, 11:53 AM   #5
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I just went out with my K20D and the lens works very nicely on it. No focus problems on that body.
04-14-2013, 01:05 PM   #6
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QuoteOriginally posted by klaus123 Quote
I have one of these 17-70/2.8-4.5 and it does NOT focus properly on my K01!
but: on K10d & K7 it works fine
04-15-2013, 06:31 AM   #7
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Sigma 17-70 version 1 fine on K01

QuoteOriginally posted by klaus123 Quote
I have one of these 17-70/2.8-4.5 and it does NOT focus properly on my K01!
Mine is great. Most of the pics in my gallery here are with this lens. Yours may be need service.
04-15-2013, 09:06 AM   #8
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Works fine on my K-01 too, it's my usual 'walking around' lens.

Chris

04-16-2013, 04:18 AM   #9
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@PBandJ and @ChrisJ: You have no problems focusing @ 70mm?
04-16-2013, 04:50 AM   #10
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QuoteOriginally posted by Spodeworld Quote
@PBandJ and @ChrisJ: You have no problems focusing @ 70mm?
I have had the lens 3 months and haven't noticed any problems. Will specifically check @70mm later today if you want. It also my main walk-about lens.
04-16-2013, 05:47 PM   #11
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The biggest issues I had were around 70mm. At the wider end, it seems quite good. I don't see any of these issues when I pop it on a K20D though. It focused quite well without any noticeable issues. Also, I put on a Pentax-F 28-80 f3.5-4.5 and at 80mm it worked just fine on the K-01.

Are there any adjustments that can be done on a screw drive lens on a camera that does not have in-camera adjustments? I thought that the focus is controlled by the camera's focus system and motor.

QuoteOriginally posted by PBandJ Quote
I have had the lens 3 months and haven't noticed any problems. Will specifically check @70mm later today if you want. It also my main walk-about lens.
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