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Canon 100mm f2.8 USM AF Question
Canon 100mm f2.8 USM AF Question Hi all, I recently purchased a secondhand Canon Macro 100mm f2.8 USM lense and the autofocusing seems to be much choppier than I've seen with my other lenses. This is my first USM/non-IS lense and I'm aware it's older, so I'm unsure if it's behaving correctly or if I should return it. I haven't been able to find clear videos showing the AF motor...
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