I can only speak from experience...but despite the 7D's advanced focusing system, I find it to be the least accurate/most inconsistent of all the bodies I've used, and this even includes the tiny SL1.
The variability of AF in a single framing can be dramatic from shot to shot. If I take 5 shots in a row, 1 of them will be OOF (sometimes 2, other times none). I've never experienced such variability with any of my other cameras.
However...in terms of speed and responsiveness, there's nothing like it when it comes to shooting action. Even the 5D3 means I have to sacrifice reach...the speed and buffer capacity of the 7D is unmatched in the "crop" department. AF inconsistency and poor high ISO performance are the trade offs.
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As for 70D vs. 6D...best to try each of them if you can and put them through their paces.
The variability of AF in a single framing can be dramatic from shot to shot. If I take 5 shots in a row, 1 of them will be OOF (sometimes 2, other times none). I've never experienced such variability with any of my other cameras.
However...in terms of speed and responsiveness, there's nothing like it when it comes to shooting action. Even the 5D3 means I have to sacrifice reach...the speed and buffer capacity of the 7D is unmatched in the "crop" department. AF inconsistency and poor high ISO performance are the trade offs.
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As for 70D vs. 6D...best to try each of them if you can and put them through their paces.
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