Re: IR flash

["J. Steven Salibo" <count0@xxxxxxxxx>]

Thanks for the info...I will increase the exposure time!
I was afraid that the IR filter on the chip would prevent any exposure at
all....

----- Original Message -----
From: ADavidhazy <ANDPPH@xxxxxxxxxxxxxxxxxx>
To: <infrared@xxxxx>
Cc: <ANDPPH@xxxxxxxxxxxxxxxxxx>
Sent: Friday, October 15, 1999 9:52 PM
Subject: Re: IR flash


> > 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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