Hello folks.
I recorded some RAW footage with my 550d just to test the grain in low light situation.
Maybe this could also help you to determine the right shooting situation
Camera:
Canon 550d
Lens:
Canon EFS-18-135mm set on 50mm
SD card:
Transcend SDHC 32gb Level 10 card
Camera Settings:
1080p 24fps mode
Iso 200
Shutter 48
frame override:
24 fps
RAW module settings:
Res: 1280x536
Aspect: 2.39:1
Got around 140 frames/take
Each lightlayer in this video was filmed 5 minutes after the other with exact the same settings each time.
Greetings, Alex546