Black light at DVinfo.net

Gabrielle Talley · December 18th, 2004, 10:24 PM

I'm shooting a Christmas play that is employing the use of black lights. When I am filming, the lights give off a green neon glow! I am using 2 GL1s. How can I adjust the camera to get rid of that green glow?

Tony Hall · December 19th, 2004, 06:47 AM

I've never tried to use black lights, but the first thing that comes to mind would be to white balance to a normal flourescent lamp before using the black light. That should take care of the green.

Gabrielle Talley · December 19th, 2004, 01:06 PM

I white balanced to a white t-shirt, but I'll try white balancing to a light. Maybe it'll work. If not, I'll just keep the area that is showing green off of the screen. Thanks!

Andre De Clercq · December 19th, 2004, 02:34 PM

Black light is UV light which is not seen by CCD camcorders only the "glow" (fluorescence) on some objects (shirts...) shows in the visible spectrum and is almost monochromatic. So this cannot be "white balanced", unless you go for B&W pics.

Gabrielle Talley · December 20th, 2004, 06:57 PM

Would a UV filter take care of the neon green glow problem that the camcorders were picking up?

Andre De Clercq · December 21st, 2004, 04:07 AM

No Gabrielle, the UV light is being converted into green light. So the light that the cam ''sees'' is real green.

December 18th, 2004, 10:24 PM	#1
Gabrielle Talley New Boot Join Date: Oct 2004 Location: GA Posts: 12	Black light I'm shooting a Christmas play that is employing the use of black lights. When I am filming, the lights give off a green neon glow! I am using 2 GL1s. How can I adjust the camera to get rid of that green glow?

December 19th, 2004, 06:47 AM	#2
Tony Hall Major Player Join Date: Jul 2004 Location: springfield, OH Posts: 344	I've never tried to use black lights, but the first thing that comes to mind would be to white balance to a normal flourescent lamp before using the black light. That should take care of the green. __________________ Tony "Good taste is the enemy of creativity" - Picasso Blog: http://www.tonyhall.name

December 19th, 2004, 01:06 PM	#3
Gabrielle Talley New Boot Join Date: Oct 2004 Location: GA Posts: 12	I white balanced to a white t-shirt, but I'll try white balancing to a light. Maybe it'll work. If not, I'll just keep the area that is showing green off of the screen. Thanks!

December 19th, 2004, 02:34 PM	#4
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	Black light is UV light which is not seen by CCD camcorders only the "glow" (fluorescence) on some objects (shirts...) shows in the visible spectrum and is almost monochromatic. So this cannot be "white balanced", unless you go for B&W pics.

December 20th, 2004, 06:57 PM	#5
Gabrielle Talley New Boot Join Date: Oct 2004 Location: GA Posts: 12	Would a UV filter take care of the neon green glow problem that the camcorders were picking up?

December 21st, 2004, 04:07 AM	#6
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	No Gabrielle, the UV light is being converted into green light. So the light that the cam ''sees'' is real green.