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CTO and CTB??


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Okay,

 

I am shooting a scene in a bedroom with the main source daylight with a 2k shooting through the window, and going to shoot 5500k preset on the hvx200 w/ redrock.

So if I want to have my arri Fresnel’s (wich are 3200k) match my preset, I would full CTO them??? Right? and for the 2k would I CTO that to match that as 5500k??

 

And the same at night, with the 2k my "moon" (shooting at 3200k then) I would full CTB it right?

 

thanks a lot

Kyle

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CTO corrects Daylight to Tungsten, CTB corrects Tungsten to Daylight. To make a 3200K Fresnel match a daylight preset, you'd gel with CTO (full) and loose 2 stops of light from it. To make a window match the interior film lights (NOT the ones in your household lamp which are closest to 2900K) you'd use full CTO.

 

CTO; 5600K~>3200K

CTB; 3200K~>5600K

 

For more infor (and a free swatch book!) see http://www.leefilters.com/

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Kyle, why you shooting 5500K?

 

because most of the light in the room is day light mixed with a few arri's, I would rather do that then have to CTO the big window, when I can CTB the lamps im using. right?

 

 

kyle

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because most of the light in the room is day light mixed with a few arri's, I would rather do that then have to CTO the big window, when I can CTB the lamps im using. right?

 

 

kyle

 

You can do that, but remember that full CTB will cut 1-2/3 stops from all of your lights that way. If you want the output of a 1K, you'll need a 5K scrimmed down a little bit once the CTB is on there. In most cases, it's easier and more efficient use of your resources to gel the windows orange.

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You can do that, but remember that full CTB will cut 1-2/3 stops from all of your lights that way. If you want the output of a 1K, you'll need a 5K scrimmed down a little bit once the CTB is on there. In most cases, it's easier and more efficient use of your resources to gel the windows orange.

 

Yeah, I see what you are saying, we might be able to get away with 1/2 CTO, but having to gel the window would be better, I agree.

 

thanks for your reply

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Yeah, I see what you are saying, we might be able to get away with 1/2 CTO, but having to gel the window would be better, I agree.

 

thanks for your reply

 

You can do partial correction if you want. It's pretty common (and a nice look) to have some orange-blue color contrast between sources like that.

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