Those measurements are 14-bit with the mechanical shutter.
They are also 14+ stops of DR which is the same as CLOG3.
The R5 C gets more dynamic range in CLOG3 so obviously CLOG3 is not the issue.
If you want more dynamic range then why not ask Canon for more dynamic range directly instead of trying to guess why and then asking for whatever you happened to guess?
I am just stating what that the sensor is technically capable of.
I can only comment on the R5 and not the R5c, but IF it has more dynamic range, then it's obviously not a hardware limitation but software.
Maybe the R5ii will have Clog4 to merge the gap? Who knows.
I have noticed on my A1 that using H265 has some weird colour shifts compared to H264. Maybe that is why we loose dynamic range on the R5? Who knows.
And besides, who am I to tell Canon what they should and should not do? They have years of data to know what would satisfy their customers. They know who buys their bodies and how they get used.
If the R5 is not for me, then it's not meant to be. I am just stating what works and what doesn't for me and what I think is lacking from the camera for my use case.
Besides, I just use my Sony body as it works a lot easier for my workflow, especially when I am not a high budget film crew with all the toys. I tried using the R5, but for my needs, it's adding more steps into my workflow to convert H265 footage, and IF I choose to record externally to get more dynamic range or attempt to get enough storage for internal RAW, it is just more workarounds I need to implement into my workflow for no reason.
I currently slap a lens on my body, hit record and I am off to the races. I import my footage into premier, slap my lut and start snipping clips. Easy Peasy.
Canon techs have been super clear about this in various interviews: It's not going to happen. They match the LOG profile on the cameras with the dynamic range, that the sensor is capable of. End of story.
Canon Europe even has a lengthly article on the LOG profiles and which for what on their website.
************* did tests using CLOG2 on the R5 C with the Cinema RAW light and also came to the conclusion, that you get a lot more noise in the shadows, which you could clean up in post and get a slight better result, but is that worth it to you ? Adding tons more noise to get potentially a little more information in the shadows seems counter productive to me. And yes, that's what you do, when you use a non-suitable log curve on footage from a sensor, that isn't giving you the information you're looking for to begin with.
And yes, if you're absolute hooked on wanting to use CLOG2 with the R5 C, you'll have to go to a RAW workflow.
/M
And because of the extras required for that workflow (a ninja recorder, the amount of storage to record raw) is why I tried using the R5 but ended up purchasing an A7iv to compliment my A1 while I wait for the A9iii to be released this year. It is supposed to be the A7siii successor. I have been a long time Canon fanboy but the simplicity of Sony for video is a nice feature. For what I need right now, Sony seems to fit the bill for any video work I do. If there was a way to make a Frankenstein between Canon for photo and Sony for video, that would be the ultimate hybrid camera.