Re: IR flash

[ADavidhazy <ANDPPH@xxxxxxxxxxxxxxxxxx>]

> ive just made myself an IR flash by taping a wratten IR filter to a flash.
> im about to try it out on a roll of film, just varying subject distances
> and apertures, but i thought i'd ask if anyone had an idea of approximate
> settings to experiment with bracketing around. i've checked the obvious
> web pages, but didnt find anything on this. for reference, my flash says
> for 100 ASA film, user aperture 4 at 12ft, 5.6 at 8ft, 8 at 6ft. im using
> kodak HIE.

You want a ballpark figure? I would suggest that you could use your flash and
determine the aperture needed as if you were using a film with a speed of 25 or
12  assuming you taped a Wratten 87C filter over the flash. 

Essentiually you can assume that the flash outs out daylight quality
illumination. Just remember that this is a ballpark, approximate, figure!!!

cheerio,

andy

Andrew  o o  0 0 o . o  Davidhazy, Imaging and Photo Tech
         \/\/\/\/\/\/          http://www.rit.edu/~andpph
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