RE: DIY flash gels

[mark@xxxxxxxxxxxxxxxxxxxx]

It will to a point IF you have auto white balance set.  Even then there is a limit to how much it will remove.  When you gel a flash, that is far greater than the cast you would get using a yellow wall for a bounce.  The light becomes yellow and the camera can usually sense that.  Still if you set the camera to a custom white balance then use say 5000 to 5500 light temp, the camera will react as if its a daylight balanced film.   Some use a custom white balance for everything.   With raw it can be adjusted later.

-------- Original Message --------
Subject: Re: DIY flash gels
From: PhotoRoy6@xxxxxxx
Date: Tue, July 14, 2009 4:42 pm
To: List for Photo/Imaging Educators - Professionals - Students
<photoforum@xxxxxxxxxxxxxxxxxx>

Perhaps I didn't explain it right. The white balance works when you take the picture to take any color cast out of the picture.  So unlike film with a digital camera you can bounce a flash off a light green wall or off colored ceiling and you won't pick up a green color cast in your subject as the camera automatically sets the Kevin temperature. Putting a gel over a flash that cover the whole scene is the same as changing the Kelvin temperature of the scene. Now if you using a flash and gel on just part of the scene that is another story.

Roy

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