Color correction gels

Pat Engh · April 20th, 2009, 08:57 AM

If trying to match sun light (coming in from window) I just put the Blue Gel (CTB) on the light (Halogen pepper light). This will basicly match lighting right?

Richard Andrewski · April 20th, 2009, 09:20 AM

Nominally you want a full CTB to do that. There isn't just one shade and they all bring a tungsten light to a higher color temperature of one or the other value. I think you'll find though, your going to lose a lot of light going that way and a 150w tungsten will be very watered down afterwards.

Pat Engh · April 20th, 2009, 09:45 AM

it's a 600 watt pepper and I also have a 300 as well.

Shaun Roemich · April 20th, 2009, 10:21 AM

As mentioned elsewhere repeatedly, transmission factor on a Full CTB is around 25% and around 50% on a half CTB

Bill Pryor · April 20th, 2009, 04:11 PM

Full CTB will get close to the daylight coming in. If it's later in the afternoon or earlier in the morning and warmer than 5500K, you might could use 1/2CTB if you need more light, since, as mentioned above, full CTB cuts your light output quite a bit. When using full CTB I generally use 1K lights. In most cases I've got by with 1/2 CTB and let the background daylight go just a bit blue.

April 20th, 2009, 08:57 AM	#1
Pat Engh Regular Crew Join Date: Jul 2004 Location: West Palm Beach Posts: 75	Color correction gels - Quick Question If trying to match sun light (coming in from window) I just put the Blue Gel (CTB) on the light (Halogen pepper light). This will basicly match lighting right?

April 20th, 2009, 09:20 AM	#2
Richard Andrewski Major Player Join Date: Jun 2006 Location: Shenzhen, China Posts: 781	Nominally you want a full CTB to do that. There isn't just one shade and they all bring a tungsten light to a higher color temperature of one or the other value. I think you'll find though, your going to lose a lot of light going that way and a 150w tungsten will be very watered down afterwards. __________________ Richard Andrewski - Cool Lights USA - RED #114 http://www.coollights.biz

April 20th, 2009, 10:21 AM	#4
Shaun Roemich Inner Circle Join Date: Sep 2002 Location: Vancouver, British Columbia (formerly Winnipeg, Manitoba) Canada Posts: 4,088	As mentioned elsewhere repeatedly, transmission factor on a Full CTB is around 25% and around 50% on a half CTB __________________ Shaun C. Roemich Road Dog Media - Vancouver, BC - Videographer - Webcaster www.roaddogmedia.ca Blog: http://roaddogmedia.wordpress.com/

April 20th, 2009, 09:45 AM	#3
Pat Engh Regular Crew Join Date: Jul 2004 Location: West Palm Beach Posts: 75	it's a 600 watt pepper and I also have a 300 as well.

April 20th, 2009, 04:11 PM	#5
Bill Pryor Contributor Join Date: Jan 2003 Location: Kansas City, MO Posts: 4,449	Full CTB will get close to the daylight coming in. If it's later in the afternoon or earlier in the morning and warmer than 5500K, you might could use 1/2CTB if you need more light, since, as mentioned above, full CTB cuts your light output quite a bit. When using full CTB I generally use 1K lights. In most cases I've got by with 1/2 CTB and let the background daylight go just a bit blue.