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Law of 2 X 1/2


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#1 James Brown

James Brown
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  • Cinematographer
  • Sydney, Australia

Posted 04 November 2005 - 10:30 PM

Hi,

Could someone please clear this up for me in lamens terms.

I'm shooting super 16 and this is is getting slightly confusing.
Say i'm rating my film at 200asa, 25fps with a 180deg shutter and stopped at 5.6.
When i rate my film now at 500 does that then need to change anything but the stop (if so how many stops, 2?), or do i need to then change the shutter to 90 as well. Also if i change the shutter do i then lose a stop. ect.....Or if i rate it less do i gain stops??

This whole thing has got me a little muddled and would be great if you could help me understand.

Thanks, James.
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