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Total brightness tungsten vs daylight


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#1 David Edward Keen

David Edward Keen
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Posted 29 December 2016 - 06:36 PM

Newbie's question here. 

 

How much does the total output in terms of i guess footcandles/lux decrease if i put a tungsten (3200K) diffusion over the 5600K LED light? It's one of those tungsten diffusion plastic plates goes right over the light.

 

I know that putting a CTB in front of my 3200 K greatly reduces the amount of light goin out.

 

I'm videoing three guys interacting on a street and I'm concerned about keeping them all inside the DOF. If I have enough light I can do a higher F stop but i probably don't, even with the street light over us.

 

 

 

 

 

 


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#2 David Mullen ASC

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Posted 29 December 2016 - 08:15 PM

It's the same as an 85B (orange) or 80A (blue) camera correction filter -- 2/3-stop for full orange (actually closer a 3/4-stop) and 2-stops for full blue.

 

A stop is equal to half or double the light, so you will cut the footcandle output by almost in half with the Full CTO correction.


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