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Foreword: I don't have a complete answer to my question yet, but I've turned up some things that are relevant; i.e. information relative to the limits of performance on Canon's AI Servo AF system. I'll post some of this information as I find it, rather than waiting. This seems a reasonable approach as it now appears likely there isn't one answer, but rather ...


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I have a Nikon d7200, the auto bracket, and focus points, show up in my final picture,,how I fix this problem,?


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If you have use of RF lenses, you have a modern mirrorless camera. If you have a modern mirrorless camera, you have manual focus with magnification at your disposal, and an EVF system that can deal with showing you something as bright as a fireworks spark without trouble. You will be able to refocus with precision at any time. In any case, unless your lens ...


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I agree small birds in flight are extremely challenging, but I don't think the main challenge is camera's autofocus system. The main challenge is that it's hard to spot small birds (I once went to a natural park to photograph birds -- I heard a huge amount of birds all around me, but rarely saw them and on the rare occasion I saw one, it flied 10 meters and ...


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Seriously, at f/22, you don't need a very accurate focus, setting the lens to infinity should be good enough, especially if you use "bulb" exposure, that coalesces the fireworks to long blurry streaks anyway(*). (*) If you want to see actual shapes, use a much shorter exposure (around 1/20s...).


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Pity, as I have used these Olympus AF lenses and they are amongst the sharpest with the best bokeh known to man. They are as sharp as Leica and Zeiss with bokeh even better than the early Takumars. I know this from personal use of these lenses on the Olympus AF 77 as well as the power focus Olympus 101. The AF zooms have heavy glass! The AF 77 is a joy to ...


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