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Kodak Eastman Double-X 16mm


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#1 Jason Hoffman

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Posted 09 July 2009 - 08:18 AM

I'm looking at getting some b/w film for shooting indoors. Looking at the Eastman Double-X Neg. It is rated at "EI 250 (Daylight) without Filter, EI 200 (Tungsten) without Filter".

Why is the ASA rated lower between daylight and tungsten if you are not using a filter in both cases?

thanks,

Jason
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#2 Adrian Sierkowski

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Posted 09 July 2009 - 08:33 AM

Black and White film is more sensitive to the blue spectrum (daylight) than the red (tungsten). it deals with the films reaction to colors of light, hence why it is slower under tungsten light as opposed to daylight. (simple answer)
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#3 Jason Hoffman

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Posted 09 July 2009 - 08:39 AM

Black and White film is more sensitive to the blue spectrum (daylight) than the red (tungsten). it deals with the films reaction to colors of light, hence why it is slower under tungsten light as opposed to daylight. (simple answer)


thanks!
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