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I have a Canon R5 that I am trying to shoot birds in flight (eagles) with with the Canon RF 800mm lens. The lens seems to see the birds fleetingly, but does not fully focus before losing the birds completely. As I move the visual field around trying ...
I have an EF 16-35 mm 2.8 L II USM lens that has some use, but not extensive. The end of the barrel seems to have an unreqasonable (to me) amount of play in it. How much should I put up with?
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