One of the main benefits of the new Mark III, over the previous models, was the added functionality of Live view, allowing users to take pictures while looking at an LCD screen.

A non-removable optical anti-aliasing filter is located in front of the image sensor, which also vibrates as part of an anti-dust mechanism (similar to the one used in the entry-level Canon EOS 400D).

The Mark III is Canon's first professional Digital SLR to include a Live View feature, usually reserved for point-and-shoot cameras.

These relate to SERVO AF mode, to stripes within the picture, cursor navigation failure, Err 99 messages and sub par low light focus acquisition performance compared to previous models.

[6] As of October 17, 2007, Canon technical representatives began stating the widely reported auto focus issue is suspected to be caused by an internal submirror assembly that requires replacement on most Cameras with serial numbers between 501001 and 546561[7] This correction has been made in production models dating to sometime shortly before the announcement of the fix.

SPECIALTY MODELS: Astrophotography a | Cinema EOS C | high resolution camera S | no AA filter effect R ⋅ FIRMWARE ADD-ON: x Magic Lantern Support