Shifting White Balance? at DVinfo.net

Brandon Freeman · September 8th, 2007, 07:30 PM

So, I love my Canon XH-A1, but I was doing some test footage, and noticed that, even though everything is set to manual, the white balance was shifting itself. Florescent light was hitting a cream colored wall, and the shade kept shifting from green to blue. Ideas as to what the problem is?

Steve Wolla · September 8th, 2007, 08:19 PM

Is it consistent, or does it do this only sporadically? Mine does something similar, mostly noticable under tungsten lighting.

John Miller · September 8th, 2007, 08:24 PM

Check this thread:

http://www.dvinfo.net/conf/showthrea...09&postcount=9

It may help.

Greg Boston · September 8th, 2007, 08:51 PM

Quote:

Originally Posted by Brandon Freeman

So, I love my Canon XH-A1, but I was doing some test footage, and noticed that, even though everything is set to manual, the white balance was shifting itself. Florescent light was hitting a cream colored wall, and the shade kept shifting from green to blue. Ideas as to what the problem is?

You have to have a shutter speed or frame rate that is equal to, or an even multiple of the frequency of the power line. Otherwise, your camera scan occurs at different points in the power waveform where the light at that instant is a different color temperature.

It's a pretty well documented issue that trips up a lot of folks the first time they run into that situation.

-gb-

Brandon Freeman · September 8th, 2007, 09:18 PM

Interesting. I was at 60i...ah, and now that I think about it had the shutter speed at 1/180 as I was showing my wife how to do slow motion with a high shutter speed. She was the one who first noticed the color shifting on the monitor, and hadn't noticed it until I amped up the shutter speed. (We weren't filming, just doing a live out and switching around to different camera modes).

Fascinating...

September 8th, 2007, 07:30 PM	#1
Brandon Freeman Major Player Join Date: Feb 2007 Location: Boise, ID Posts: 226	Shifting White Balance? So, I love my Canon XH-A1, but I was doing some test footage, and noticed that, even though everything is set to manual, the white balance was shifting itself. Florescent light was hitting a cream colored wall, and the shade kept shifting from green to blue. Ideas as to what the problem is?

September 8th, 2007, 08:19 PM	#2
Steve Wolla Major Player Join Date: Nov 2005 Posts: 477	Is it consistent, or does it do this only sporadically? Mine does something similar, mostly noticable under tungsten lighting.

September 8th, 2007, 08:24 PM	#3
John Miller Major Player Join Date: Oct 2005 Location: Hillsborough, NC, USA Posts: 968	Check this thread: http://www.dvinfo.net/conf/showthrea...09&postcount=9 It may help.

September 8th, 2007, 09:18 PM	#5
Brandon Freeman Major Player Join Date: Feb 2007 Location: Boise, ID Posts: 226	Interesting. I was at 60i...ah, and now that I think about it had the shutter speed at 1/180 as I was showing my wife how to do slow motion with a high shutter speed. She was the one who first noticed the color shifting on the monitor, and hadn't noticed it until I amped up the shutter speed. (We weren't filming, just doing a live out and switching around to different camera modes). Fascinating...