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CTO measure to match both lights?


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#1 Tiago Pimentel

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Posted 01 September 2017 - 03:41 PM

Hi guys,

 

I have a question. I shot the first part of a night exterior scene yesterday with a dedollght LED kit to light the actors (the street is illuminated by the street lamps). I dimmed the dedolights to 2800k to match as close as I could with the street lamps. Next week we're shooting the rest of the scene but I won't be able to take the same kit. The only light available are two Rotolights LED bicolor. But these lights will only go to 3150k. 

 

I wanted to match both lightings. Even if I WB the camera to 3150, the street illumination will change. So my best option will be to try to transform the 3150k to 2800k, using CTOs. Any idea on the measure I need? Maybe 1/4 is enough?

 

Thanks!


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#2 Stuart Brereton

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Posted 01 September 2017 - 06:22 PM

According to the Lee Filters Mired Calc, that's a 40 Mired Shift. 1/8 CTO or CTS should be fine.


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#3 Tiago Pimentel

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Posted 01 September 2017 - 06:54 PM

Thanks stuart! I'll take 1/8 cto and place in front of the Rotolight.

Btw, I've never worked with this Rotolight leds which has all of those of tiny led bulbs that need to be diffused. Maybe using diffusion paper directly on the light? Will that be enough to properly diffuse it?
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