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Making Tungston Lamps Daylight Balanced


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#1 Corey Bringas

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Posted 22 November 2006 - 03:15 AM

So how do you do it? I have a shoot comming up where I'm shooting some day interior stuff. I haven't yet seen the location in person, though i know there are big windows throughout the house. Most likely I'll be getting enough light from outside (shooting on 7205) but I may want to add a little fill here and there. I only have tungston balanced lights. Do I throw 1/2 CTB, Full, quarter? Thanks for answering what probably is a rather amature question.
-Corey
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#2 Alex Wuijts

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Posted 22 November 2006 - 03:45 AM

typically you put full ctb on a tungsten source, to correct 3200K to 5500K daylight. Sometimes daylight is warmer or cooler, so that's why you have different densities of ctb and cto. Just compare the two sources with you eye and see if they match. If not, get another filter.
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#3 Allen Achterberg

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Posted 22 November 2006 - 04:47 AM

If you're not completely comfortable with judging the color temp by eye, if you have a color temp meter that helps, or do as I and others do, take a still with a digital camera (no flash) or even a video camera.

All The Best!
Allen Achterberg
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#4 Corey Bringas

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Posted 22 November 2006 - 05:14 AM

Ahh great point Allen! I will be bringing my DSLR with me and taking some test shots! Thanks to both of you for the help!
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#5 Matt Sandstrom

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Posted 22 November 2006 - 11:35 AM

another option is to gel the windows with cto and shoot on a tungsten stock. the main advantage is that full ctb on a tungsten light cuts its intensity by around 2 stops while the cto will only cut the daylight by 2/3.

/matt
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#6 Bob Hayes

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Posted 22 November 2006 - 12:07 PM

I find 2/3 ctb seems to balance daylight in most interior situations. Full is too blue and cuts down the lights too much.
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#7 timHealy

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Posted 22 November 2006 - 01:48 PM

you can also get dichroic bulbs for some tungsten lights which will bring color temp up to about 4800 or so.

best

Tim
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#8 Dan Goulder

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Posted 22 November 2006 - 02:13 PM

Don't underestimate the latitude of Kodak '05 stock. Their claim of its ability to work with mixed lighting isn't mere advertising hype. I've gotten amazingly well balanced results using 5205 with a combination of daylight and uncorrected tungsten practicals. (Maybe I owe all the credit to my colorist, but at least I gave him something he could work with.)
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