Re: IR and Flash Photography

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

On 20 Aug 96 at 10:10, Steve Homer wrote:

> >From: "Willem-Jan Markerink" <w.j.markerink@xxxxx>
> >
> >How did you set your flash meter for HIE & #87C?
> >The same as outdoors, 10-12 ASA?
> 
> I set my flash meter for ASA50, and the negatives
> are maybe a half-stop thinner than I'd like. Outdoors I was
> getting an effective ASA of 800 with the 87C.
> 10-12 ASA, really? Are we comparing ASA's to DIN's
> or something? That's a pretty wild variation.

Nope, with a bare outdoor metering, I set my Gossen Sixtomat Digital 
to 12 ASA. Kodak recommends 10 ASA btw.
Are you sure you don't mean the 'through-the-filter' [as from now
declared TTF....:-))] reading with either the TTL camera meter or
the hand held meter??

 
> I used TMAX developer, probably not a great choice,
> but what I had on hand. If I'm concerned above all with
> getting less grain, and don't mind sacrificing film 
> speed, what developers would people recommend?
> 
> >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....;-))
> 
> Could you give us a brief lecture on Schwarzschildt effect? ;-)

I was hoping noone would ask....it might be opposite to the original 
problem: AFAIK, Schwarschildt discovered that long exposures need 
additional time to get the same results as was calculated. Caused by 
slower acting film when few photons hit the film. I am not 
sure if this phenomena equals the requirement of *less* exposure at 
very short shutter times, I somehow feel it should also require more 
exposure than calculated.
 

> Unfortunately, she didn't show up.... Next month, she says. 
> 
> Seriously, though, I've tried split-filter printing
> to get local contrast enhancement of tattoos against
> light skin. I'm experimenting with the IR
> films to try to accomplish the same thing. 
> 
> If only the SFX-200 was available in medium format....
> My flash system isn't powerful enough to get a useable
> depth of field for portraits with the Konica. 

I believe Ilford said about other formats: 'If demand permits'.
So start hassling every Ilford rep you encounter!....8-))

 
--
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. 17