I ran accross a 5DM3 HDR article on Canon's Learning site. It's about what I expected but it would be better if it could save the resulting file in a 16 bit/color file format. At least the input files taken can be RAW and you have the option of saving them but of course that is the same as a 3 shot bracket.
http://learn.usa.canon.com/resources/articles/2012/5d3_hdr_capabilities.shtml
* Sorry if this link is a double post. I didn't see it anywhere.
http://learn.usa.canon.com/resources/articles/2012/5d3_hdr_capabilities.shtml
* Sorry if this link is a double post. I didn't see it anywhere.