Re: IR and Flash Photography

[rrosener@xxxxxxxxxx (Russ Rosener)]

>BTW, my darkroom specialist friend ran some more extreme tests with
>SFX. He used a B+W 093 filter (equals #87C), and got an effective
>film sensitivity of -30 DIN (yes 'minus'!). I believe he said he
>exposed for 4 minutes (f5.8-8 I guess), and developed the film for
>about 30 minutes....8-))
>Also a nice testimonial that ASA is worthless in some cases....you
>need a calculator to read the same in (fractions) of ASA....;-))
>
>--
>Bye,
>
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>     _/  _/ illem    _/     _/ an    _/  _/  _/ arkerink
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>

This seems to imply that SFX is not a truly infrared film as the Ilford
company rep. in my area told me. Seems to me that if you are getting
NEGATIVE ISO readings, the film is way beyond its parameters. How did your
friend's negatives
look? Did he get some good results, or just mush?

Russell J. Rosener
rrosener@xxxxxxxxxx


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* "TWO AND TWO MAKE FIVE." *
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Topic No. 2