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03-08-2010, 12:13 AM   #1
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Anyone used Sigma 70-200 non-HSM AND HSM? which is faster AF?

I have the first version of the Sigma 70-200/f2.8 and the K-7. The AF is pretty speedy by my historical standards (istDs, K20D). However is the HSM version AF faster or just quieter? All ancedotal as well as scientific evidence accepted!

Thanks.

03-08-2010, 12:37 AM   #2
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Not sure - I have hsm and non - hsm sigmas. I usually use MF on my non - hsm (10-20 - I use it for panoramas for Zagat shoots and the client's guidelines are mf on all shoots). My 70-200 is hsm and the focus is very fast (I think faster than my DA* sdm lens). I have a shoot tomorrow and will check. Very good question (even though I didn't answer it )
03-08-2010, 04:34 AM   #3
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I got the APO 70-200mm EX DG HSM II version a couple of weeks back, the focus is pretty quick. I couldn't see how the non-HSM version would be as quick as the lens with HSM. After using the Sigma 17-70mm on the K20D with screw drive, the HSM is just brilliant. Now I want to replace my small lens with a HSM version. Maybe the new Sigma 17-50mm f2.8 with HSM would be the go.
Any lens I get now I would want it to have HSM or similar on it.
03-08-2010, 04:33 PM   #4
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Good to hear it's quicker. Time to start saving I think.

Ari, still interested to hear from your check.

03-08-2010, 06:06 PM   #5
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There was quite a debate about this some time back. It really came down to the lens and how much focus throw and power was needed to turn the thing if I recall.
03-08-2010, 06:12 PM   #6
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If you skip to 0:30 seconds in this video, you can check out the speed of the 70-200 non-HSM on the K20D

[YT]http://www.youtube.com/watch?v=FMjruIXJBKc[/YT]
03-09-2010, 04:53 PM   #7
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QuoteOriginally posted by LeDave Quote
If you skip to 0:30 seconds in this video, you can check out the speed of the 70-200 non-HSM on the K20D
Yeah I have the non-HSM one too, and to me it's quick, but if the HSM is appreciably quicker - I'm in!

(Boy that 16-50 is comparativley slow!)
03-14-2010, 09:32 AM   #8
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So I checked the difference between my non-hsm Sigma and sdm on my Pentax (not exactly the comparison you were looking for, but it's the best I could do). I did not notice an appreciable speed difference for what I was shooting (up close food dishes). It may be different in the field, focussing on fast - moving, or variable difference objuects. Gonna have both Sigmas out in the field next Saturday - gonna have to make a conscience effort to remember to check this. Since now I am so curious about it...

03-14-2010, 04:37 PM   #9
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Cheers. Thanks Ari. Will await the results from your further testing eagerly.
03-24-2010, 05:19 AM   #10
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Ok. After using my HSM and non - HSM Sigmas out in the field, I can't seem to see an appreciable difference in speed. But, it may not be a fair comparison, since the focal lengths are so different, and the use of the lenses are so different. My 10-20 was used to focus on a building and my 70-200 was used on a moving target. So this will have to be considered anecdotal
03-24-2010, 04:28 PM   #11
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Thanks Ari - I think!

It's impossible to find an HSM version of the 70-200 here to compare myself.
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