Accuracy of various lights
Posted 29 July 2016 - 05:47 AM
Posted 29 July 2016 - 09:25 AM
Posted 29 July 2016 - 10:36 AM
Daylight changes a lot. In clear conditions, it's a mix of Skylight which is around 10,000k and Sunlight, nominally around 5000K, but which varies according to time of day & year, location and how much atmospheric pollution it's coming through. In overcast conditions, that same mix is coming through hundreds of feet of dirty water vapor, which is doing who knows what...
Then you have the problem that lamp manufacturers can't seem to agree on a CT for daylight, so you have lamps ranging from 5000k to 6500k, which all look a bit like daylight under certain circumstances.
Lastly, not all CTB gels are created equal. If you look at LEE CTB and Rosco side by side, you'll see that the Rosco gel leans toward the magenta, whereas the LEE is more neutral, although you could argue that the Rosco gel is correct and the LEE is more green, I guess.
Working here in southern California, I'm pretty much guaranteed that 'Daylight' means sunlight, so I tend to use HMIs with 1/4 CTS as a main source, and then use daylight kinos as a slightly cooler fill. I try not mix lamps, so if I'm ever using Tungsten with CTB as daylight then that's all I use.
Posted 29 July 2016 - 03:25 PM
Probably would be best to line up all your lights against a long white wall in a dark room and photograph the results to see what the differences are, then adjust with gels from there. As long as the lights all match each other, that's a good start.
Posted 29 July 2016 - 03:43 PM
Thanks, folks. Wanted to be sure I wasn't doing something utterly ridiculous.