Quote:
Originally Posted by gafftaper
I don't have the exact answer to your question. You can somewhat accurately think of I.R. as the heat escaping the lamp... yeah there's more to it than that, but a large part of the heat you feel is really IR. Something that only produces 50 lumens is going to be very dim... but it's still generating a lot of heat... and a lot of IR.
Also I believe you should be using some extra dark Red Gel, not Blue. I believe at the high end of the spectrum there is some cross over between Red and IR. Blue Gel would potentially block those "near IR" wave from getting through.
How am I doing? Anybody?
|
Good call on the red, yes it is closer to IR. I think the idea though was that color filters are designed to let as much heat through as possible, so as not to burn out. This means that the difference between deeply saturated blue and deeply saturated red would be negligible, so since blue (I would think) would be harder for the audience to pick out, you can run it at a higher intensity, getting more IR light, without having the light noticed by the audience. Though all of the preceding was a guess.