OT: white LEDs

[Tony Duell]

> > Has anyone ever tried them for flim photograhpy?
> I saw white LEDs used as lighting for macro photography. Though with

Yes, that's what I was thinking of using them for.  A ring of white LEDs 
around the lens may be useable as a cheap alternative to a ringdlash 
(which I don't own, and can't justify buying).

> digital cameras. Most white LEDs are weak on the red side of the
> spectrum. Sometimes this gets mitigated by adding extra red LEDs.

I would have thought the problem with doing that is that the red LED 
output is a very narrow band of wavelengths. It may not compensate that
well on colour film

I guess the thing to do is to try it.  OK, sometime when I've got some 
spare time I will pay around with various LEDs, a camera and a grey card.

-tony