In his Lighting 102 series, David Hobby (of Strobist fame) shares his techniques with gels, that piece of plastic you stick in front of your flash to alter the color of the light.
Gels not only have the capacity to change the color of your lighting, they also have a very useful ability to balance color. And it is this aspect of gels that David is focusing on this new post.
The Strobist writes, “The important thing is that you have to be able to counteract your conversion gel with a white balance camera setting. That is to say that, even if your fluorescent light is not a perfect green, you pretty much have to live with the difference. Just green your flash and neutralize it (the flash) with the FL white balance setting. Sometimes the ambient will go a little weird. But it is better than not gelling at all.â€
[Via: Strobist]