55-135mm Grinding Sound when Zooming

[skimmel]

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Hi everyone, I rented a 55-135 for my CL this weekend.  I noticed that when I zoom and power is on, there is a whirring/grinding sound in the lens. (Doesn't happen when camera is off.) Also, doesn't seem to be aperture changing since it happens even with higher apertures where f-stop doesn't change when zooming.

 

Is this normal?

 

Thanks. 

[jaapv]

That is a lens with sand inside. Mine is silent, with a small clicking sound from time to time when focussing.

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[skimmel]

That is a lens with sand inside. Mine is silent, with a small clicking sound from time to time when focussing.

 

Thanks. I will let the rental agency know.  I assume the lens will still work OK?

[jaapv]

I couldn't say whether it will function correctly. It doesn't reflect well on the rental company - they should check their gear before giving it out.