Comme je n'arrive pas à dormir, je détaille le site de Rob Galbraith, et j'y lis ça, qu'en pensez vous ?

Not switching to a newer EOS-1D Mark III In this article update, we've not drawn a distinction between an older EOS-1D Mark III, with its sub-mirror repair done at a Canon service centre, and a newer one that was manufactured with the revised sub-mirror from the outset. That's because in every instance where we've shot older and newer bodies side-by-side, starting before the latest firmware updates and continuing after, the autofocus characteristics - such as stable stationary subject autofocus or frontfocus shifts in sequences - have been about as similar as they could be.

There are tens of thousands of EOS-1D Mark III cameras out there, and to date we've shot with only two that have had the sub-mirror repair, so it's possible that there are some bodies that got the sub-mirror fix that don't autofocus at the same level as the repaired ones we've used. This is possible, even if it's not very likely (assuming a proper repair was done, the body and lenses are calibrated correctly and so on).

Also, Canon could introduce a rolling change in the camera today and not announce it, one that would make tomorrow's bodies autofocus better than everything that came before, both those that had the sub-mirror repair and those that were built with the revised sub-mirror part. This is also possible, also unlikely, but not impossible. We can say that the two newest EOS-1D Mark III bodies we've used were assembled in February 2008 and April 2008, and there was no apparent difference in their autofocus characteristics when compared to the oldest, a May 2007 body with the sub-mirror repair.

Based on what we've seen in pictures produced by EOS-1D Mark III bodies built as much as 11 months apart, one with the sub-mirror repair and two with the revised sub-mirror part installed during manufacturing, there is no reason to believe that a newer EOS-1D Mark III will deliver better tracking autofocus than one with a proper sub-mirror repair. This information, however, comes with a best before date of April 2008, because we haven't tried a body that was manufactured since then.

Si Silver Dot passe par içi, ton avis éclairé m'intéresse évidemment...