The 5DSR packs a 50.6 megapixel sensor into a familiar DSLR body. This means you get images with resolution rivalling some medium format systems, while still being able to use the huge range of EF mount lenses, an advanced autofocus system, and a familiar workflow.
The Canon 5D mark III is the DSLR of choice for many professionals. Resolution is similar to the mark II but stills and video image quality are improved with a better sensor. It has a new 61 point autofocus system, improved video compression and faster continuous shooting.
The DSLR that started the large sensor video revolution. Not only is it capable of capturing stunning stills with its full frame CMOS censor, but you can also capture full resolution 1080p HD movies with it.
The EOS 7D is has a 19-point AF system, magnesium alloy construction, a large bright viewfinder, full HD movie recording, 8 frames per second continuous shooting, and many more features for professional use.