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01-18-2014, 04:40 PM   #1
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Tamron 70-200 auto focus faster with k-3 or k-5 IIs ?

As the title reads.... I see the only real complaint about this lens (Tamron 70-200 2.8) is that the auto focus is a bit slow.
Is there improvement with the new cameras? Or is it still just as slow on any camera, old or new?

01-18-2014, 04:44 PM   #2
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If I'm not mistaken, the screwdrive motor on the K-3 is faster than the one on the K-5 (II). So it'll probably be faster. How much faster I don't know.
01-18-2014, 06:13 PM   #3
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QuoteOriginally posted by skid2964 Quote
As the title reads.... I see the only real complaint about this lens (Tamron 70-200 2.8) is that the auto focus is a bit slow.
Is there improvement with the new cameras? Or is it still just as slow on any camera, old or new?
The K-3 has a faster AF motor, so you can expect the AF to be up to 50% faster. The farther the motor has to turn the focus ring, the more benefit you'll get from the K-3.

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01-18-2014, 07:05 PM   #4
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As an aside... the 70-200 was dog-slow on a D600. I suspect most of the poor reviews about Tamron focusing speed are on Canon/Nikon.

On a K-5 I didn't feel it was objectionable at all... certainly on par or better than the 60-250 F/4. If it's better still on the K-3 it's a great yet (relatively) inexpensive lens.

01-18-2014, 08:21 PM   #5
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I talked a guy the other day that shoots photos of his kids at swim meets with a Canon 60D and a Tamron 70-200, he said it was so slow to focus that it was un-usable for any action shots but otherwise sharp as a tack if it has time to focus. I'm glad to hear it is better on a newer Pentax. I have a K-5 IIs.
01-23-2014, 07:45 PM   #6
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I think my 70-200 is quick focusing on my K5ii. It is a top notch lens for IQ.
01-23-2014, 07:47 PM   #7
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QuoteOriginally posted by skid2964 Quote
I talked a guy the other day that shoots photos of his kids at swim meets with a Canon 60D and a Tamron 70-200, he said it was so slow to focus that it was un-usable for any action shots but otherwise sharp as a tack if it has time to focus. I'm glad to hear it is better on a newer Pentax. I have a K-5 IIs.
On Canon and Nikon, Tamron uses their micromotor on their non USD lenses. It's supposedly very slow and gives Tamron a bad name with Canon and Nikon. With Pentax, they default to the screwdrive.
01-23-2014, 07:51 PM   #8
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And the fact that its IQ is as good for 1/3 of their prices it is worth it. The 70-200 f/4 US Canon is crazy fast on a 7D.

01-24-2014, 09:20 AM   #9
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Yesterday I tried my Tamron 70-200mm 2.8 on a K-5IIs and on a K-3. I really felt the difference made by superior focusing system of K-3, and powerful Af motor. Faster, more quietly, less hunting, almost on par with Sigma 70-200 HSM. On a K-5IIs, the difference over my old K-5 classic wasn't significant.

Test was made inside, with not very much light, no AF assist lamp, no flash. I also has my Sigma 70-200mm and a Pentax 60-250mm.
01-24-2014, 09:31 AM   #10
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QuoteOriginally posted by skid2964 Quote
As the title reads.... I see the only real complaint about this lens (Tamron 70-200 2.8) is that the auto focus is a bit slow.
Is there improvement with the new cameras? Or is it still just as slow on any camera, old or new?
More that the speed, AF accuracy with k-5/k-x + 70-200 was an issue for me. K-5II should be the same but k-3 probably has a better reliability.
01-24-2014, 07:14 PM   #11
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QuoteOriginally posted by JimmyDranox Quote
Yesterday I tried my Tamron 70-200mm 2.8 on a K-5IIs and on a K-3. I really felt the difference made by superior focusing system of K-3, and powerful Af motor. Faster, more quietly, less hunting, almost on par with Sigma 70-200 HSM. On a K-5IIs, the difference over my old K-5 classic wasn't significant.

Test was made inside, with not very much light, no AF assist lamp, no flash. I also has my Sigma 70-200mm and a Pentax 60-250mm.
Is there any difference between the K5IIS and the K3 as far as tracking focus goes?

Thanks

Randy
01-25-2014, 12:27 AM   #12
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I didn't tested on moving targets yesterday.

Last edited by JimmyDranox; 01-25-2014 at 12:32 AM.
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