This is when I lost respect for RG. He had just received two cameras that had the \"latest fix\" and then went on to say there was no improvement in the autofocus. That is in total disagreement to many world-class photographers here on FM. So you can either believe RG (who is now a Nikon shooter) or you can believe those of us here on FM that have been through the whole experience with the AF fix. Here was my proof that my MKIII was working well - https://www.fredmiranda.com/forum/topic/781567/0
and here is what RG says on his site - anyone with a fixed MKIII could get the results I did with my test
Q. Does the revised AF calibration or firmware v1.2.5 bring an improvement in tracking autofocus?
No. The EOS-1D Mark III with these changes does not capture a greater proportion of properly focused or nearly focused frames when continuously tracking a moving subject. As before, the camera has a tendency to spontaneously focus in front of where it should - though it will at times shift the focus behind for several frames too, especially when Assist AF points are enabled - and it happens often enough to produce an unacceptable number of missed peak action moments.
With a quick-focusing lens like the EF 300mm f/2.8L IS, the EOS-1D Mark III remains able to rapidly acquire focus when a subject is moving and the AF system is first engaged. If the picture is taken immediately after focus is acquired, focus is often accurate too: the EOS-1D Mark III remains a killer strobed volleyball camera for this reason. Tracking, however, is still the camera\'s Achilles heel. This is true regardless of the tested AF point configuration, and regardless of whether single frames, short bursts or long bursts are captured.
In short, there\'s nothing in the over 4000 frames we\'ve shot leading up to this article update to suggest that the revised AF calibration or v1.2.5 firmware have improved the camera\'s principal remaining autofocus weakness. If you shoot sports, or something equivalent to it, and therefore require strong autofocus tracking, the EOS-1D Mark III will continue to disappoint. It can capture some in-focus tracking sports pictures at wide open apertures, as demonstrated by the several example photos sprinkled up and down this page. But, it continues to flub the focus on more frames than it should for this level of camera. And it\'s still easily outclassed by its predecessor, the EOS-1D Mark II N (and the EOS-1D Mark II before that).
Nov 01, 2009 at 10:30 AM
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