Tamron 90mm macro strange sound

nirVaan · 07-19-2011, 05:39 AM

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

macTak · 07-19-2011, 08:38 AM

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).

**Just1MoreDave** · 07-19-2011, 11:14 AM

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.

nirVaan · 07-20-2011, 02:26 AM

Originally posted by macTak

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

JeffJS · 07-20-2011, 06:30 PM

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.

pop4 · 07-21-2011, 12:07 AM

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.

07-19-2011, 05:39 AM	#1
nirVaan Senior Member Join Date: Jul 2011 Location: Tokyo Posts: 115	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

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07-19-2011, 08:38 AM	#2
macTak Veteran Member Join Date: Apr 2010 Photos: Gallery Posts: 759	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
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	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
nirVaan Senior Member Join Date: Jul 2011 Location: Tokyo Posts: 115 Original Poster	Originally posted by macTak 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
JeffJS Inactive Account Join Date: Aug 2008 Location: Michigan, USA Photos: Gallery \| Albums Posts: 7,484	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
pop4 Veteran Member Join Date: Aug 2007 Location: YMML Photos: Gallery Posts: 1,879	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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