Red Balance on Gl2 at DVinfo.net

Tatsuya Graham · March 25th, 2007, 01:02 PM

I just bought a GL2 and it came in the mail the other day.. Well I started capturing footage in low lighting and it seems like the red balance on it increases.. Why does it do this? Is there anyway to fix this problem?

Thnx,
Tatsuya Graham

Don Palomaki · March 25th, 2007, 06:21 PM

Low light often means dim incandescent lights, which tend to the red; i.e., low color temperature.

White balance in the camcorder is accomplished by adjusting the gain in the analog amplifiers between the CCD and the A/D converters. They also provide the gain for the gain setting. (Now recall that with film, it takes perhaps 1-2 stops of aperture to compensate for filters beteen daylight and tungston for film.)

Assuming you already have the camcorder gain at max, in poor light you may just plain run out of enough gain to do effective color balance.

The fix is to add more light, go to a slower shutter if you can deal with the motion artifacts, or try do some additional color correction in post - or convince the client it is a new art look..

Dale Guthormsen · March 26th, 2007, 10:25 PM

don,

Great post!!! I like the new look part!!! Couldn't be explained any clearer.

March 25th, 2007, 01:02 PM	#1
Tatsuya Graham Regular Crew Join Date: Mar 2007 Location: Memphis, Tennessee Posts: 50	Red Balance on Gl2 I just bought a GL2 and it came in the mail the other day.. Well I started capturing footage in low lighting and it seems like the red balance on it increases.. Why does it do this? Is there anyway to fix this problem? Thnx, Tatsuya Graham

March 25th, 2007, 06:21 PM	#2
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,489	Low light often means dim incandescent lights, which tend to the red; i.e., low color temperature. White balance in the camcorder is accomplished by adjusting the gain in the analog amplifiers between the CCD and the A/D converters. They also provide the gain for the gain setting. (Now recall that with film, it takes perhaps 1-2 stops of aperture to compensate for filters beteen daylight and tungston for film.) Assuming you already have the camcorder gain at max, in poor light you may just plain run out of enough gain to do effective color balance. The fix is to add more light, go to a slower shutter if you can deal with the motion artifacts, or try do some additional color correction in post - or convince the client it is a new art look.. __________________ dpalomaki@dspalomaki.com

March 26th, 2007, 10:25 PM	#3
Dale Guthormsen Inner Circle Join Date: Jun 2005 Location: Saskatchewan Posts: 3,048	don, Great post!!! I like the new look part!!! Couldn't be explained any clearer. __________________ DATS ALL FOLKS Dale W. Guthormsen