#318 Proper shadows handling when pushing Canon RAW files

[Zbigniew]

Please, examine following threads:
https://www.reddit.com/r/photography/comments/3q8q7o/purple_noise_in_shadows/
https://www.reddit.com/r/photography/comments/3q4tnz/how_to_correctly_push_5_stops_with_canon/
They are about the flaws in software, which (flaws) cause "purple noise" in shadows - and detailed discussion, what should be done to avoid the problem.