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Noise when changing aperture on my Tamron 17-70mm?

Started 3 weeks ago | Questions
Photoswithreg New Member • Posts: 8
Noise when changing aperture on my Tamron 17-70mm?

I recently purchased a Fuji X-H2 and a Tamron 17-70mm lens and I noticed that when I change aperture’s via the X-H2 the lens makes a mechanical noise. It’s not super loud or anything but I wondered if that’s normal or not?

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miles500
miles500 Senior Member • Posts: 1,215
Re: Noise when changing aperture on my Tamron 17-70mm?

I have the XT5 with tamron 17-70 and changing aperture via the command dial on the camera is completely silent.

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Miles500

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fernandojval
fernandojval Regular Member • Posts: 428
Re: Noise when changing aperture on my Tamron 17-70mm?

My Tamron 17-70mm f2.8 does not make any noise when changing aperture. Tamron & Adobe have another problem, yet to be solved: https://community.adobe.com/t5/camera-raw-bugs/p-rings-vignetting-with-tamron-17-70-lens-on-fuji-xt-4/idi-p/13150865

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sluggy_warrior Veteran Member • Posts: 3,204
Re: Noise when changing aperture on my Tamron 17-70mm?

Photoswithreg wrote:

I recently purchased a Fuji X-H2 and a Tamron 17-70mm lens and I noticed that when I change aperture’s via the X-H2 the lens makes a mechanical noise. It’s not super loud or anything but I wondered if that’s normal or not?

The 17-70 has a chatty aperture gear, it's normal.

You don't hear it when changing the aperture via the command dial, as the aperture change usually doesn't apply right away until you half-press the shutter button.

But if you point the camera between dark and bright scenes, the aperture will change accordingly and the gear clicking noise can be heard. My brain completely ignores the noise after 2-3 weeks shooting with it.

From what I observed, if the camera knows which aperture it needs to change to, the lens can do it quickly without noise, e.g. when half-pressing the shutter button. But if the camera is adjusting to the scene, e.g. pointing from dark to bright scene or releasing the shutter button, it sends repeated commands to the lens to close/open the aperture one step at a time, that's when the noise is most audible as it's a long chain of slow clicks.

Given how the lens takes twice as long to start up (comparing to Fuji lenses) on my X-T2, I assume it's a communication issue between the lens and body. Perhaps Fuji didn't release the protocol completely, or Tamron didn't do a good job on understanding it. Thus, the body cannot adjust the aperture as effectively as it should (it waits for the lens to tell it that's the aperture has changed to measure the light before trying again). Perhaps communication is also the cause of lens correction metadata not being embedded correctly in EXIF (as we've seen the issue reported by fernandojval)

Lettermanian
Lettermanian Senior Member • Posts: 2,389
Re: Noise when changing aperture on my Tamron 17-70mm?

Photoswithreg wrote:

I recently purchased a Fuji X-H2 and a Tamron 17-70mm lens and I noticed that when I change aperture’s via the X-H2 the lens makes a mechanical noise. It’s not super loud or anything but I wondered if that’s normal or not?

I use it on my X-T3, both with the latest firmware (as an aside, make sure the lens firmware has been updated to 2.01). The noise (though low) is present when the camera is in either auto or manual shutter or aperture mode. It is mostly noticeable when the aperture adjusts to varying exposure from moving the camera around; I don't hear any noise just by manually selecting aperture values with the dial. When aperture and shutter are both set to manual, the lens is silent, as the exposure changes then come from ISO adjustments (ISO in AUTO). It would be interesting to ask on the Sony forum if the same behaviour occurs with Sony cameras...

FWIW, I also tried my Fuji 70-300 and my Zeiss 12mm f2.8, and both of these lenses are silent when adjusting the aperture with the front dial. The noise doesn't bother me, and in all other respects I quite enjoy the lens. On the X-T3 it has only a minimally slower start-up time than my 70-300 and my Zeiss 12mm, usually ready in one second or less ( I have sensor cleaning set to activate when I power off the camera).

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