Because Canon does not want users to shoot bad footage with the Canon cameras. Simple as that. Sony having SLOG3 in all cameras is a marketing gimmick. It's not a technically desirable feature.
CLOG2 requires the sensor to be capable of 15 stops of dynamic range. 16+ for extended CLOG2 on the DGO sensors.
The R5 only has 13 stops of dynamic range. Canon squeezed another stop of dynamic range out of that sensor with CineOS in the R5 C. And that is why it only get CLOG3 and never will get CLOG2.
If you were to record with CLOG2 on the R5 C, all you'll get is more noise in the shadows. Nothing more. Tests using RAW footage interpreted as CLOG2 have exactly shown that. You just add garbage, if the sensor can't handle it.
/M
I have a Sony A1 and A7iv and a Canon R5. The best I can shoot in the R5 is Clog3. If I shoot slog2, I get similar dynamic range to the R5’s footage, if I shoot slog3 (the clog2 equivalent and designed for sensors with 15+ stops) I get a better dynamic range on my cheap a7iv. Some gimmick…
Both the a7iv and R5 measured a similar 14.7/14.6 EV sensor.
According to cined, the R5 with clog3 shows 10 stops, the a7iv and a1 with slog2 are at 13.
Now maybe it’s not the log curve, or maybe it’s because canon forces us to record in h265 and information is lost in the high compression, but all I am saying is, Sony gave me an option to use a log curve developed for high grade sensors, and it made “some” difference.
Even if clog2 cannot be fully utilized, maybe we can get 1 more stop if dynamic range? Maybe for pro’s it will make streamlining footage from a cinema camera and the R5/R5c a little easier since they’re shot in the same log?
My point is, why not give us the options to use what we want to use. I would love h264 compression so I can actually edit the footage and not have to convert it in post.
Maybe the option of 4k120 ipb, etc
To quote a great legend:
I don’t want to know what it’s designed to do, I want to know what it can do.
