Subject: Re: Digital sensors and white/colour balance.
Tungsten is really a worst-case scenario for digital capture for three reasons:
Silicon is red (and IR)-sensitive where film was blue (and UV)-sensitive.
The blue filter is the least efficient in terms of transmission of light. (A few cameras have attempted to get around this by using CMY instead of RGB filtration, but that introduces its own set of headaches, which is probably why very few cameras use CMY filters.)
Tunsgten emits very little short-wave (i.e. blue) light.
These three factors conspire to make the blue channel weak under tungsten.
If you use filters to attempt to correct this, "expose to the right" becomes even more important, otherwise you risk winding up with extra noise in all three channels.
View All Messages in adobe.photoshop.camera.raw
Digital sensors and white/colour balance. =>
Copyright © 2006 WatermarkFactory.com. All Rights Reserved.