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03-04-2012, 12:08 PM   #1
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K-5 + Sigma 17-70mm f/2.8-4 DC Macro OS HSM?

I am going to buy a new K-5 in the next few days and then use my K-r as backup. I am really leaning on getting a new Sigma 17-70mm f/2.8-4 DC Macro OS HSM lens as my walk-around lens. Does anyone have any sample images they care to share? How do you like the build quality.....is it noisy when focusing, especially in low-light? The wide angle Pentax lenses don't really appeal to me too much hence my reason for leaning towards the Sigma. Thanks.


Last edited by treebeard; 03-04-2012 at 01:32 PM.
03-04-2012, 01:07 PM   #2
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I have the older version of the lens, which I'm happy with. It's no noisier than any other lens I use (except the 150-500 that has HSM).
03-04-2012, 01:12 PM   #3
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I have used the older version that was not OS nor HSM and it was pretty nice. I had the Pentax 17-70 f/4 and was totally unimpressed with it...noisy and not sharp at all.
03-04-2012, 01:15 PM   #4
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I use this combo as my primary setup (though with the newer 2.8-4 version). Having battled LBA since first getting into digital photography, I've tried numerous times to replace the 17-70 as my main lens, all to no avail. The sharpness of the photos, the fast QUIET focussing and the convenient FL have kept it on my camera.

I tried HARD to find a zoom lens that encompassed a larger range (18-200, 18-250, 18-135, etc. Call me a dreamer!) but the inconsistent quality across the focal range was disappointing.



I don't have access to any photos at the moment. But trust me, you will not be disappointed!

03-04-2012, 01:34 PM   #5
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I fixed my post to reflect that I am looking at the NEW Sigma 17-70mm f/2.8-4 DC Macro OS HSM (seems I forgot how to cut and paste!!) as opposed to the old version. I appreciate the input.
03-04-2012, 03:47 PM   #6
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I have the sigma older lens. It does a surprisingly good semi-macro photo. It does work much much better on my K5 than any of my the other three older bodies.

However I have used the penatx 17-70 and my sigma lens makes the pentax lens look brilliant in comparison. This could be due to only having used the pentax 17-70 on the K5. If I were to buy on non WR zoom now in this kind of range I would go the Sigma 17-50. I am hanging out to see what the new pentax 17-50 will be like.
03-04-2012, 04:13 PM   #7
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I can only comment on the lens:

The focusing is quiet (but not smooth focusing, you can check youtube). The focus speed is slow on my k-x compared to the screw drive of the DA 35. Lens is quite good from 17-50, and ok from 50-70. The 7 aperture blades is nice. Bokeh wide open is good. Hood is meant for wide angle, so it doesn't help at 50-70mm.

Build is nice, the zoom is well dampened. The lens weighty, but the OS may feel weird as it has a floating element or something. I like the lens as a budget replacement for the kit lens.
03-04-2012, 04:21 PM   #8
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Thank you for you opinion and your findings.

03-05-2012, 02:31 AM   #9
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Not a bad lens at all, it is on my K-5 a lot. Its size is well-balanced with the grip attached to the camera. I actually use the OS feature (and find it effective) as I have SR permanently turned off in-camera.

The only thing that irk's me about the lens is the amount if vignetting.

Other then that, it was a bargain considering I bought it for $325 new!
03-05-2012, 05:10 AM   #10
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QuoteOriginally posted by neil Quote
Not a bad lens at all, it is on my K-5 a lot. Its size is well-balanced with the grip attached to the camera. I actually use the OS feature (and find it effective) as I have SR permanently turned off in-camera.

The only thing that irk's me about the lens is the amount if vignetting.

Other then that, it was a bargain considering I bought it for $325 new!
That is true - the vignetting on the wider ends is annoying - I don't notice so much because Lightroom has a profile for the lens.
03-05-2012, 05:17 AM   #11
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I had the older version and it was a great lens, but I cannot comment on the newer version as I moved on to the DA*16-50 F2.8 and the DA18-135WR, both are great copies and great lenses on their own.
03-05-2012, 05:36 AM   #12
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I can reiterate exactly Special K's experience. It is a good lens, but not a great lens. Since then I have gotten the Tamron 17-50 F/2.8 which I like a LOT better, sharper, constant aperture, lighter and somewhat smaller. If you can afford it I would recommend the Tammy instead.

NaCl(the Tamron 17-50 is practically welded to my camera)H2O
03-05-2012, 07:13 AM   #13
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Thanks for the comments. I am looking at the Tammy as well...but not sure as I had two of them in the past and both had focusing issues and I was disappointed. The only reason for me getting the Tammy would be for the constant 2.8.
03-08-2012, 11:45 PM   #14
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I second or third the Tammy.........
cheers
Jan
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