So you mean:
1. Open up aperture to its widest setting
2. Shoot colorchecker
3. Close down aperture to intended setting
Did I get it right?
Regarding the 10-bit remark, the video was shot in C4K ALL-I 24p with bit depth 10 (I guess that’s what you refer to when you say 10 bit codec?).
And finally, what do you mean by “shooting this way” [is a bad idea]?