Photographer Rob Galbraith has posted his latest take on the Canon EOS-1D Mark III after Canon has fixed the cameraâ€™s sub-mirror mechanism and updated the firmware to version 1.1.3.
â€œWithout question, the sub-mirror fix improves EOS-1D Mark III AI Servo autofocus: it eliminates the cameraâ€™s big drop in autofocus accuracy when the mirror box gets warm or hot,â€ Rob writes. â€œOur experience is that it helps stabilize the autofocus performance so that the EOS-1D Mark III delivers about the same number of in-focus frames whether it’s warm or cold.â€
Firmware 1.1.3 also played an important part in improving the cameraâ€™s autofocus, he said.
â€œBut in our view, thereâ€™s more work to be done. In bright conditions, the EOS-1D Mark III still doesnâ€™t match the EOS-1D Mark II N; at times the two are close, and at other times the EOS-1D Mark III’s autofocus performance is below what we consider acceptable,â€ he concludes.