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inverse square law


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#1 Nossair CHKERBOUBY

Nossair CHKERBOUBY
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Posted 12 June 2014 - 08:52 PM

hi guys,

 

can someone give a link or the name of a book where i can learn about the inverse square law specifically for cinema.

i want to learn the hole think note a simplified equasion.

 

thank you


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#2 John E Clark

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Posted 13 June 2014 - 12:15 PM

hi guys,

 

can someone give a link or the name of a book where i can learn about the inverse square law specifically for cinema.

i want to learn the hole think note a simplified equasion.

 

thank you

 

Here is a URL that has a general description of The Law.

 

http://www.portraitl...esquare_law.htm

 

Here's a 'webtool' for ARRI lights in determining what amount of light is at what distance, for ARRI lights.

 

http://calc.arri.de/calculator

 

Since ARRI lights are popular cinematography lights, you can use the calculator to figure things out from imagined scene scenarios.

 

The problem with 'cheap' lights, is that often the manufacturer or seller has no 'data' like the ARRI lights to allow you to calculate what the light intensity is in a given setup.


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