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07-19-2011, 05:39 AM   #1
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Tamron 90mm macro strange sound

hi guys i have a 2nd hand tamron 90mm macro and it works great but my only concern is accidentally shook it once and there was a sound as in something is fallen apart inside the lens so i did it few more times and the sound is still there.any thoughts

thanks

07-19-2011, 08:38 AM   #2
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Try shaking it again, this time holding the aperture actuating lever on the rear mount (sometimes it can make a little rattling sound when the lens is not mounted on a camera).
07-19-2011, 11:14 AM   #3
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Fortunately Pentax has shake reduction, so it's OK.

The most likely part to make noise is the aperture lever. A non-Pentax lens is usually designed with a two-part system, to make it easier for the manufacturer to adapt the lens to other mounts. So there's more moving parts there. On a 1:1 macro lens, the distance between the aperture blades and the mount can vary by a couple of inches/50mm, so those lenses have an extensive mechanism to move the blades.
07-20-2011, 02:26 AM   #4
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QuoteOriginally posted by macTak Quote
holding the aperture actuating lever on the rear mount
where is this exactly located. but i suspect this must be what im experiencing i will try and connect it to the camera and see whether the sound is still there

07-20-2011, 06:30 PM   #5
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It is the little black lever that sticks out of the rear of the lens.

If the lens works on the camera and takes sharp photos, I doubt you have anything to worry about.

07-21-2011, 12:07 AM   #6
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I just took my Tamron 90mm F2.8 Macro out and gave it a little shake; yep there's a little rattling sound. Nothing to worry about though.
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