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All Forums > Tech Talk > Tech Talk Forum Page 28 > Question about a Canon Ultrasonic 28-135 lens...
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Bandit One
Deactivated User

No Place That Far
612 Posts
9/02
Posted - Feb 14 2008 : 11:06AM
I don't know if I just never noticed it before, but I recently caught the sound of a very light rasping noise coming from my Canon Ultrasonic 28-135 IS lens while focusing... is this normal? It can be heard while in AF or Manual- again it's a very light sound, almost like static. FWIW, the camera is a Canon EOS 30D and there doesn't seem to be any problems with the it's functions, otherwise.
Edited by - bandit one on Feb 14 2008

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conquistador
Deactivated User

Hellhamster.
2947 Posts
10/03
Posted - Feb 14 2008 : 11:41AM
I don't know if this helps but my Canon, though it is different model makes a bit of sound while focusing and it seems top be working just fine.
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RandomPrecision
Senior Member

Enjoy!
8175 Posts
3/06
Posted - Feb 15 2008 : 9:06AM
I know nothing about Canon cameras but it's probably normal. Focusing is a mechanical function. There's a little servo in there that does the focusing.
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