TAKO. INTERNET SEIT 1996.
Olympus-OM

Re: [OM] Re: film pushing

Subject: Re: [OM] Re: film pushing
From: Lars Haven <lhaven@xxxxxxxxxxxxx>
Date: Thu, 08 Jan 1998 20:41:20 +0100
Peter Leyssens wrote:
> 
[snip]
> 
> What the purpose of all this is ?  Well, just experimenting.  If the
> effect is graphically nice, that's fine.  If I can just shoot pictures
> of the Pleiads with my 300mm/f5.6 without a tripod, that would be nice
> too (astrophoto pun : that's a few minutes exposure normally).
> 
> --
> Peter Leyssens
> Eonic Systems
> 
> Support mail : support@xxxxxxxxx
> 
If you really want to get every photon, you can add another of the
old tricks: Pre-expose the film with diffuse light. Every film has
a critical exposure level. It does not begin to darken until that
level has been reached. By pre-exposing the film to just below the
critical level, the sensitivity effectively is increased. And it does
not sacrifise the shadow details. It takes some experimenting to get
it right.

(This might be a feature for the ultimate OM camera: Built in
pre-exposure. Mount a few tiny lamps around the lens to give the 
small, diffuse exposure. But C*n*n did it first on the F1 :-(
Probably patented it also...)

Lars
-- 
Lars Haven  <lhaven@xxxxxxxxxxxxx> aka <lhaven@xxxxxxxxxxxx>
"You just predict the worst you can imagine.
 Inevitably someone is going to hail you as a prophet."
                                                Tom Leherer

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