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07-21-2011, 09:05 PM   #1
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Tamron and Sigma 70-200 f/2.8 Autofocus Speed Comparison



Conclusion: Sigma's HSM is noticeably faster and quieter than Tamron's screw-drive, but you already knew that

07-21-2011, 10:08 PM   #2
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The in-depth comparative review at PF is relevant to the thread:
Fast Sports Zoom Lenses for Pentax | Sigma 70-200mm vs. Tamron 70-200mm vs. Pentax FA* 80-200mm F2.8
07-21-2011, 10:11 PM   #3
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QuoteOriginally posted by darrenleow Quote
Conclusion: Sigma's HSM is noticeably faster and quieter than Tamron's screw-drive, but you already knew that
What camera bodies were driving those lenses?
07-21-2011, 10:35 PM   #4
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QuoteOriginally posted by EsBee Quote
What camera bodies were driving those lenses?
The same K-5 was used for both

07-21-2011, 10:35 PM   #5
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QuoteOriginally posted by hcc Quote
The Sigma in that is the newer OS version which is a good couple hundred bucks more expensive than the HSM II that I have though

Last edited by darrenleow; 07-21-2011 at 11:09 PM.
07-22-2011, 07:06 AM   #6
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sigma is not only faster, but more accurate too.
07-22-2011, 07:25 AM   #7
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The difference is clear when cycling fully from infinity to min focus, and back, and it seems at least in part due to longer throw on the Tamron. I wonder if the difference in time from start to focus lock when dealing with shorter throws would become negligible for my intended usage. Alas...only one way to find out: I have to try both.

Thanks for posting, I'm in the process of trying to decide whether to go Sig or Tam for my 70-200/2.8 (and kicking myself for selling my old Sig 70-200/2.8).

QuoteOriginally posted by kent Quote
sigma is not only faster, but more accurate too.
Is this noted from first-hand experience with both? Someone else's tests? Curious if there are other tests I may consider as I can't afford to buy both to do my own testing.
07-22-2011, 08:17 AM   #8
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I just took the Sigma out and shot some normal static scenes with it. I can't tell any difference in autofocus speed or accuracy between the two in normal use. Will put it through its paces in AF-C, although the K-5 and Tamron combo has worked well for me so far in that respect.

07-23-2011, 03:43 AM   #9
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QuoteOriginally posted by thirdofthree Quote
The difference is clear when cycling fully from infinity to min focus, and back, and it seems at least in part due to longer throw on the Tamron. I wonder if the difference in time from start to focus lock when dealing with shorter throws would become negligible for my intended usage. Alas...only one way to find out: I have to try both.

Thanks for posting, I'm in the process of trying to decide whether to go Sig or Tam for my 70-200/2.8 (and kicking myself for selling my old Sig 70-200/2.8).



Is this noted from first-hand experience with both? Someone else's tests? Curious if there are other tests I may consider as I can't afford to buy both to do my own testing.
I have Sigma and also have tested Tamron. Tamron is ok for most situations, while sigma is ok for all situations. I took some pictures at late evening of Drift event, and tamron was noticebly slower and made more micro adjustments to achieve focus, while sigma was spot-on in most occasions. Tamron is not slow, however it is not fast either (compared with sigma). In dim conditions I found sigma HSM work better and more accurate. While there might be some reservations for sigma @ 200mm f/2.8, both lenses deliver good result. Tamron is better at the end of range, while Sigma is amazing in the middle (70-135mm).
07-23-2011, 09:22 AM   #10
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Thanks for the additional feedback and clarification, Kent -- I appreciate it.
07-26-2011, 05:03 AM   #11
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Good comparison video Darren! Any chance of doing a head to head image sample test?
07-26-2011, 08:35 AM   #12
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QuoteOriginally posted by TOUGEFC Quote
Good comparison video Darren! Any chance of doing a head to head image sample test?
I'll see what I can do later this week. Stick the camera on a tripod and switch the lenses for comparison real-world shots at f/2.8 and f/8, at different distances. Do you think that's a good test procedure?

I remember never being disappointed with the Tamron's stellar IQ, but with the Sigma there are a couple of times when I feel like "Hmm, that's a little bit soft..." It has a glowy look when doing close-up shots, which quite often is precisely when you want to avoid the glow (but it might be desirable for portraits) such as shooting big bugs like butterflies.
07-26-2011, 12:59 PM   #13
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Yeah mate that sounds good, f/2.8 and f/4 i think would be better, at 70mm 135mm and 200mm.
Thanks in advance!
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