EOS-1D X Mark III
- Jan 29, 2011
The only thing you need to worry about as the light changes color is keep putting more CTO gel on the flash and shoot at a constant ºK. Just so long as the light sources are pretty close (the very last rays of a setting sun will be too orange to gel so just leave it at 2 - 2 1/2 stops of CTO) and you are shooting RAW you can sort out the best WB in post with a single click.One problem is the lighting changing every second as the sun sets. I get so flustered making adjustments I forget to pose the model properly.
Best advice is to get a couple of sheets of 1/2 and or 1/4 CTO gel and keep adding more layers to keep track with the changing sunlight
Buy Rosco Cinegel Filter #3409 RoscoSun 1/4 CTO (20 x 24" Sheet) Review Rosco R3409
Buy Rosco Cinegel Filter #3408 RoscoSun 1/2 CTO (20 x 24" Sheet) Review Rosco R3408
Of course this is assuming you want a consistent and relatively uniform WB across the image, you can of course use different colored light to exaggerate different elements within the scene, personally I find flash way to blue in setting sun images.
So here is the same shot three times, I was actually testing gels and have a flash with gel as the main light and the setting sun as a rim light.
1: As shot with gelled flash and fixed ºK WB
2: Corrected via custom camera profile and regular WB etc
3: 'Graded' to the output look I was after
Edit: I found a better example of what I was trying to illustrate so changed the three images.