Check the Ultimate Atomos Ninja Setup Guide for Canon and Sony Cameras: https://youtu.be/iv3rreK0D9Q

If you downloaded the latest Canon LUTs (lookup tables) for C-log and you are looking a way to know which one to use in your next project, look no further, here is a solution for you, a simple table to look for the LUT you need.

Just choose your camera acquisition color space and gama, then the color space and gamma in your project, lastly, the grid size, bigger is better. In the case of the Canon EOS 5D Mark IV and the EOS R, the C-log LUT use the color space BT2020 Gamma CanonLog.