Re: IR and Flash Photography

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 18 Aug 96 at 3:17, Steve Homer wrote:

> I haven't (yet) tried putting filters over the
> flash, but I have used studio flash with all
> three black-and-white IR films, with #25
> filters, and with an 87C filter for HIE. 

How did you set your flash meter for HIE & #87C?
The same as outdoors, 10-12 ASA?

> The only big surprise was with the Konica
> film: rating it at ASA8 gave me unprintably
> thin negatives with flash and overly dense
> but printable negatives outdoors. I only tried 
> this once, and may have misread my light meter.
> Has anyone else found this film to be 
> especially slow with flash?

Just a thought: you might run into a Schwarzschildt effect you've 
never seen before....1/1000s is not something the Konica engineers 
would have been worried about when they wrote the spec sheet....;-))
 
> Sunday afternoon I'm photographing a 
> model who has a lot of tattoos. I'll
> be using the Konica and Ilford SFX
> films; they both darken tattoos nicely.
> Should be interesting...

Cute!
Must remember that.

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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The difference 
between men and boys
is the price of their toys

<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 7