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04-03-2012, 07:11 PM   #1
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Tamron 90mm f2.8, the old version (172E)

Hi, i just got the tamron 90mm today (used lens). So,while I was testing it, i noticed that the focus ring can easily be turned even the lens is in af mode. the lens is not focusing but the focusing ring is turning.is that normal?im sorry if i expalined this badly. if anyone has any idea,please let me know.

Thank you.

04-03-2012, 07:14 PM   #2
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I have this version of the lens, and it's my best glass I'm sure.

Check the push-pull part of the barrel: if the --M-- is showing by itself you are disengaged from the AF pin. Push the barrel forward so that --AF-- shows above the --M-- and you're engaged in AF mode. For least wear and tear on the lens you must put the barrel in manual focus mode and switch the camera body to MF for manual use.

2nd try
When mine is off the camera and in AF mode, the ring turns easily but focus is unaffected. If that is what you meant, then yes that is normal! Sorry if I took your message in another direction.
04-04-2012, 02:41 AM   #3
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QuoteOriginally posted by jimr-pdx Quote
When mine is off the camera and in AF mode, the ring turns easily but focus is unaffected. If that is what you meant, then yes that is normal! Sorry if I took your message in another direction.

Hi, thanks for the reply. This is what im looking for. im glad thats normal for the lens, Thanks again.
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