Half the battle isn't even about implementing patented technology, it's just understanding the file layout and the meaning of various flags and headers. There'

Half the battle isn't even about implementing patented technology, it's just understanding the file layout and the meaning of various flags and headers. There's no legal risk to Canon in releasing that basic documentation but they still refuse to do so. I've used Canon kit for over 30 years but I'm not going to upgrade to CR3 cameras if they maintain this obtuse attitude.