Everything about Canon Full-Frame DSLR cameras all on one page:

Buyer’s Guide: Canon EOS Full-Frame DSLRs at DV Info Net (http://www.dvinfo.net/article/buyers_guides/buyers-guide-canon-eos-full-frame-dslrs.html)

-- instruction manual downloads
-- press release and product page links
-- comparison chart and individual descriptions
-- product support page links & firmware download links
-- prices and "where to buy" from DV Info Net sponsors

Models covered are:

EOS 6D Mk. II

EOS 5D Mk. III

EOS 5D Mk. IV

EOS 1D X Mk. II

Mistakes, omissions, suggestions, complaints? Say so here, please. Hope this helps,