Rob’s Update on the Blue-Dot EOS-1D Mark III autofocus issue

If you owned or looking to get the Canon action-pack 10 fps Mark III, you probably heard about the wide spreading Mark III autofocus issues on the web. Rob Galbraith from robgalbraith.com has been tracking the AF issues since day one and eventually pushed Canon for a hardware fix. Canon issued a new Blue-Dot version or aka sub-mirror fixes for existing models built before October. Rob Galbraith just published their latest report with the fixes in additional to a new firmware.

In summary, there’s a significant improvement with the blue-dot version. The sub mirror help sustaining autofocus accuracy in varies temperature. However, Rob is arguing that performance falls short comparing to the last model Mark II N under bright condition, the overall performance received a rather discouraging B-. Good news for me! that’s good enough excuse not upgrading my dusting Mark II N or wait for a better yet cheaper Mark III N.

Assessing the sub-mirror fix and v1.1.3 firmware [via robgalbraith.com]