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#1 Saba Mazloum

Saba Mazloum
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Posted 11 May 2007 - 03:28 AM

Hey guys,
I know i can find these answers in books and what not, but if you guys dont mind, could you help me understand them in the easiest way? thanks.

what is the difference between Tungsten , HMI lights? When should i use them? :blink:
Tungsten film? Day light film?
Will it be a big problem if i dont know much about foot candles? :huh:
4k par, what does the Par mean?

I might have more questions later.. Sorry for the noobnes..

Thanks..
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#2 David Regan

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Posted 11 May 2007 - 10:27 AM

Hey guys,
I know i can find these answers in books and what not, but if you guys dont mind, could you help me understand them in the easiest way? thanks.

what is the difference between Tungsten , HMI lights? When should i use them? :blink:
Tungsten film? Day light film?
Will it be a big problem if i dont know much about foot candles? :huh:
4k par, what does the Par mean?

I might have more questions later.. Sorry for the noobnes..

Thanks..


I expect there are other topics that can answer your question but anyway...

The big difference between Tungsten and HMI lights is their color temperature in degrees Kelvin. Tungsten lights have a warmer color temperature which is typically 3200K. HMI lights however have a much cooler CT which is typically around 5600K or 6000K depending on who made the globes.
This relates do your question on daylight/tungsten film, this just means they are balanced to corretly represent colors under the given lighting. So Tungsten film accurately represents color under Tungsten lighting (3200K), and conversely Daylight film accurately represents color under daylight (5500K). Shooting Tungsten film in daylight and vice versa requires the use of filters typically an 85 filter to shoot Tungsten film in daylight, and and 80A to shoot daylight film under Tungsten lighting.
Foot-candles are a unit of illumination. Knowledge of footcandles is defintely important so I do suggest you find out more on the subject.
PAR is a type of fixture that is very useful, as they put out a lot of light per watt, so they are very efficient. PAR stands for Parabolic Aluminized Reflector.

Good Luck

Edited by David Regan, 11 May 2007 - 10:28 AM.

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CineTape

Glidecam

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Broadcast Solutions Inc

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Technodolly

rebotnix Technologies