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I have a Canon 300MM F:2.8 IS L series lens and the tripod mount collar is no longer rotating smoothly.  This is the original EF lens and I am sure that the bearing surface has become worn.  There is a plastic ring that I believe needs replacing.  An...
I shoot special events, weddings, corporate functions, livestock, and wildlife.  I have been shooting a couple of EOS 30D's for several years but just purchased a 7D MKII.  I am somewhat torn as to what to get for my second camera now.  Should I just...
We have a Canon SX40Hs and cannot activate the digital zoom function.  I have tried changing the mode from Auto to "P" to "Tv" etc and the dig zoom function is greyed out and not accessible.  Any help? Thanks
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