EF 17-40mm f/4L USM

Started Feb 13, 2012 | Discussions thread
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Re: EF 17-40mm f/4L USM
In reply to Outbreak187, Feb 13, 2012

I happened across your postsince I just bought a used 17-40 as well.
FYI: I did not hear the the high pitched noise that you posted on you tube.

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Canon PowerShot SD790 IS Sigma SD1 Merrill Canon EOS 6D Canon EF 50mm f/1.2L USM Canon EF 100mm f/2.0 USM +40 more
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