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Gelling Reflectors


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#1 Dan McCormick

Dan McCormick
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Posted 09 March 2008 - 07:37 PM

Hi

I was on a shoot the other day when someone put some ctb on a polyboard, and it seemed to make sense that this would double the effect of the ctb as the light would be passing through it twice, but a quick test with a dslr showed that there wasn't really any difference between gelling the light or gelling the reflector (although there were a couple of other lights hitting the area photographed).

I was hoping someone could clear this up for me.

Thanks

Dan McCormick
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#2 Andrew Koch

Andrew Koch
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Posted 09 March 2008 - 11:20 PM

Placing a gel completely and directly onto a reflector will double the effect of the gel. It sounds like the test was misleading. A quick test with a DSLR is not the best way to test this because it does not give you quantifiable results. What other lights were in the shot? That could be what threw off your results. The best way to test this is with a color temperature meter. However these can be very expensive. If you want to see the difference with your DSLR, set the white balance to 3200K, set everything on manual, shine a tungsten unit onto a reflector with half CTB covering it. Shine the reflector onto a white piece of showcard, beadboard, or even a piece of white paper. Then do another one with the gel directly on the light. Make sure you do not change your exposure or any other settings on your camera between shots or the change will be harder to see. Also make sure there are no other lights spilling onto the paper including ambiance from the window.

Hope this helps
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