Question about Canon Telephoto EF 300mm f/2.8L IS Image Stabilizer USM Autofocus Lens

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When the Image Stabilizer is switched on using the Canon EF 300mm f/2.8L IS USM, it shakes constancy in the viewfinder of the camera... Any ideas, Many thanks

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Does it shake more than when IS is off? If the IS has failed (and it probably has) Error 01 will usually display. First, I'd try cleaning the contacts; check this article for the procedure.

http://www.richardsnotes.org/archives/2005/04/29/50mm-lens-contact-points/

If that fails, whether warranty is still in effect or not, I suggest you contact CanonUSA repair and ask their opinion. If still in warranty, and repair/replacement is suggested by Canon, ask them for an RMA for return by UPS.

Posted on Oct 16, 2010

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Posted on Jan 02, 2017

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1 Answer

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Here is a link to many Canon products in PDF form: Canon Parts Lists


Unfortunately, the only 300mm 2.8 lens listed is the IS version

The procedure is not that complicated, but you need to pay attention to the connections on the circuit board. The mount is removed, and you need to remove the small screws that hold the connector board to the mount ring first.

I cannot do live chat due to I use a Mac, but I will monitor the thread if you have questions,

Kevin

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