daylight gel kit
i found a kit with 6 varying shades of blue gels for converting incandescent/tungsten lights to match daylight.
my question is: how does one know which gel or combination of gels to use? do you just "eyeball" it? is there a technique for determining how to match the outdoor light? some kind of color temperature meter?? thanks bobby |
Re: daylight gel kit
I've found some info. the Lee filter kit contains 6 shades of gel -
200 Double C.T. Blue Converts tungsten (3200K) to daylight (26000K) 201 Full C.T. Blue Converts tungsten (3200K) to photographic daylight (5700K) 202 Half C.T. Blue Converts tungsten (3200K) to daylight (4300K) . 203 Quarter C.T. Blue Converts tungsten (3200K) to daylight (3600K) 720 Durham Daylight Frost Smoothes PAR or flood washes of large areas. Useful for houselight and good for entrances from natural light. 218 Eighth C.T. Blue Converts tungsten (3200K) to daylight (3400K) also, found this rough estimation of outdoor color temperatures: . Light Source.........................Kelvin temperature......................R G B Values Candle......................................1900.......................................255, 147, 41 40W Tungsten.......................... 2600.......................................255, 197, 143 100W Tungsten.........................2850.......................................255, 214, 170 Halogen...................................3200.......................................255, 241, 224 Carbon Arc...............................5200.......................................255, 250, 244 High Noon Sun..........................5400.......................................255, 255, 251 Direct Sunlight..........................6000.......................................255, 255, 255 Overcast Sky............................7000.......................................201, 226, 255 Clear Blue Sky..........................20000.......................................64, 156, 255 Plus, there are color temperature meters, but they're $1,500 + |
Re: daylight gel kit
Thanks I love the Lee Daylight Filters, now I actually know which ones to use, up until now I've been eyeballing them.
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Re: daylight gel kit
Quote:
You should also know that tungsten light is so deficient in the blue part of the spectrum that it takes a quite saturated blue gel to balance it to daylight. In fact, the transmission coefficient of some Full CTB gels is only 24%, which means that it passes only 24% of the source. Which makes gelling tungsten lights is a very inefficient way of creating a daylight source (a tungsten 1000w gelled with CTB becomes a 240W daylight source.) - Guy Holt, Gaffer, ScreenLight & Grip, Lighting Rental & Sales in Boston |
Re: daylight gel kit
Does anyone know how these filters combine?
for instance, if one filter converts tungsten to 4600k -- and another converts tungsten to 3400k - will the two together convert to 10,000k? (just adding the values together?) |
Re: daylight gel kit
I suggest you get this book it will explain a lot more than can be said on these forums and give you a good basics in lighting technique: Motion Picture and Video Lighting : Blain Brown : 9780240807638
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Re: daylight gel kit
thanks for the suggestion. I just found the book you mentioned at the library.
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