I'm shooting a scene in a dark bark with a Letus35 FE and Canon FD 28mm f2.8. Not a lot of lighting to use (Arri 650w fresnel, Arri 150, a couple of house lamps). Early set showed the need to use medium (6db) gain, but still looked very grainy. Any ideas? I'm shooting 24pa with detail at +7 and everything else set to 0. Curious, without bringing in a 1K, who do I eliminate the grain/noise?