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Senior Member
300mm f4 L question
Ok, I see on Bryan's review he states that this lens has a Ring type USM. However, when I was looking at the lens on Amazon, it states it is the Micro USM. I tried looking on the canon site, but it doesn't really state they type of USM that the lens has. So I guess the question which type of focusing mechanism does it have?
Appreciate anyone's input.
Thanks,
Jayson
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