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Old November 18th, 2005, 12:40 PM   #1
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Gel to match florescents?

Does anyone know of a gel that can make a tungsten fresnel match florescent fixtures?
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Old November 18th, 2005, 12:56 PM   #2
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Marco,

You are looking for "Color Temperature Green" gels, also called CTG as opposed to CTB and CTO for daylight and tungsten. Most of the gel makers carry them.
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Old November 18th, 2005, 01:36 PM   #3
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Thanks. Anyone know a product number? I'm not having any luck searching for CTG at the B&H and Rosco sites.
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Old November 18th, 2005, 03:05 PM   #4
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Marco - Give Tom @ Albany theater supply a call. I've been surprised what he has around.
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Old November 18th, 2005, 04:10 PM   #5
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Rosco carries them as 'plus green'

gels.http://www.rosco.com/us/technotes/filters/gam_equiv.asp

Scroll down to bottom. You can, of course, alter your FLOURESCENTS to match your tungstens, in which case you gel the flos with PLUS MAGENTA.(OR "Minus Green"... depending on the brand) Up to you to decide which is easier. (Usually you gel the secondary light source to match the primary... but not always.)
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Old November 18th, 2005, 06:11 PM   #6
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Thanks yet again Richard. You always seem to have the answer to what I'm looking for.
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Old November 18th, 2005, 06:57 PM   #7
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Marco,

Ummm... does that mean I get to add "Guru" to my list of useless appellations?
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Old November 18th, 2005, 10:56 PM   #8
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You may also need CTB to get the tungsten up to whatever the florescents are at.

There's a way to calculate how much CTB you need based on the color temperature of the fluorescents. If the lights were specified with chromacity co-ordinates you'd be able to calculate how much plus green you need, but otherwise just match things up by eye (and look on a color monitor or in the viewfinder).
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