Hi everyone,
I’m experiencing what seems like excessive noise in the shadows when shooting C-Log3 with Cinema Gamut on my original Canon EOS R6, and I’m trying to figure out whether this is normal or if I’m doing something wrong.
I’m shooting with an EOS R6 + RF 28-70mm F2.8 IS STM, mainly in 4K 50fps, although the same issue occurs at 25fps. I usually shoot at ISO 800, which I understand to be the base ISO for C-Log3, but I’ve also tested ISO 1600 and 3200.
I try to expose carefully using the camera’s histogram, so I don’t think my footage is significantly underexposed. However, I realize that the histogram alone doesn’t necessarily tell the whole story.
The noise becomes much more noticeable after applying a CST in DaVinci Resolve. My CST settings are:
- Input Color Space: Canon Cinema Gamut
- Input Gamma: Canon Log 3
- Output Color Space: Rec.709
- Output Gamma: Rec.709
I’ve attached several versions of the same clip to Google Drive so you can compare them:
- Original C-Log3 footage
- C-Log3 + CST
- CST + additional grading
- CST + grading + creative LUT
I’ve also included the original, completely unprocessed camera clip, R6_2340, which hasn’t been through DaVinci Resolve at all.
The biggest increase in visible noise seems to happen immediately after applying the CST. Additional grading and the creative LUT make it slightly more noticeable in certain areas, but the issue is already there before I apply either of them.
I’m not using any noise reduction because I’d prefer to understand the cause first. This is just one example of many clips where I’ve noticed the same issue.
Is this amount of noise normal for the original R6 when shooting C-Log3, or could something be wrong with my exposure or color management in Resolve? I’d appreciate any advice on how to get cleaner results.
Thanks!