Autofocus making strange sound with new lens

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stuarthamilton

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Stuart
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So I bought a new macro lens for my D850 (Sigma 105mm F2.8 EX DG OS HSM Macro Lens), I've been testing it out and I've noticed the sound the D850 makes when autofocusing is different from my other lens.

All my other lenses make a smooth subtle sound when autofocusing. On the new lens the sound is more audible and not smooth. Does anyone anyone have any ideas of what might cause this? Or do some lens cause louder autofocus sounds? I don't have a huge lens collection to compare to, I only have 3 other lens, 2 of which are other Sigmas which again make smooth autofocus sounds.

My main concern is that if there is a problem with the lens it could be damaging the autofocus system on the D850.

Let me know what you think, thanks.
 
It'll be the OS
 
It might just be a noisier af motor in the lens compared to a Nikon swm, I have the same lens and have had no issues on D300, D500, D3 and D810 or as above the OS system.
 
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stuarthamilton said:
So I bought a new macro lens for my D850 (Sigma 105mm F2.8 EX DG OS HSM Macro Lens), I've been testing it out and I've noticed the sound the D850 makes when autofocusing is different from my other lens.

All my other lenses make a smooth subtle sound when autofocusing. On the new lens the sound is more audible and not smooth. Does anyone anyone have any ideas of what might cause this? Or do some lens cause louder autofocus sounds? I don't have a huge lens collection to compare to, I only have 3 other lens, 2 of which are other Sigmas which again make smooth autofocus sounds.

My main concern is that if there is a problem with the lens it could be damaging the autofocus system on the D850.

Let me know what you think, thanks.
Click to expand...

I used to own this lens and do recall it being quite loud at focusing.

Yes, some lenses are definitely louder than others.

Shouldn’t affect your camera.
 
Thanks fo the the advise.

I turned off the OS and the autofocus sounds like my other lens.

Looking forward to giving the lens a proper test!
 
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