I don't know why you find it necesarry to constantly attack my knowledgability of video. As stated before I never claimed to have vast knowledge of video and that is the very reason why I'm on the forums. I'm looking into many cameras including the 1Dc as well as other digital video cameras.
I can actually purchase a 1dx Mark ii in excellent condition and a 300 f2/8 non is used locally for the same price as the r6 24-105 kit .. I have shot Nikon pro bodies for years, but have wanted the perks of mirrorless, and Nikon has been well behind Sony and now canon..
The EOS 5D Mark IV’s higher ISO performance means you can capture those dark and majestic low-light scenes with less risk of noise affecting image quality. AF lowest EV. -2 EV. -3 EV -4 EV in live view. Autofocus in low-light. Focus on your scenes and subjects more accurately and in light as low as -3 EV. The EOS 5D Mark IV’s AF system
The handling of Canon EOS 5D Mark IV (60) is more effective than that of Canon EOS-1D X Mark II (32). But, as you may know, the technical performance is meaningless if applied to the wrong context. This is the reason why the iCamRank "weights" differently the camera technical features for each type of photography.
Lexar 2000x 64GB UHS-II. Based on my current tests, the Lexar 2000x is your best bet for UHS-II memory cards in the Canon 5D IV. They were one of the first companies to start making UHS-II cards and they get a lot of great reviews. In-Camera Speed: 70.52 MB/s – Amazon.