Analysing the EOS-1D Mark III sub-mirror fix and firmware v1.1.3

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At long last, our analysis of Canon's sub-mirror fix and firmware v1.1.3 for the EOS-1D Mark III is live. Does the hardware change and new firmware solve the camera's AI Servo autofocus problems? Does the EOS-1D Mark III now match or exceed the bright light autofocus performance of its predecessor, the EOS-1D Mark II N? Here, in 8500 words and over 650 full-resolution photos, is our answer.

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