>This fact (HP5 long exposures behaviour) was already pointed at on this
>list. In fact HP5 is the fastest b&w film available for longest
exposures.
>Elite 100 is the fastest among the slides, if I remember well.
Yes, I know that HP5 is a very stable film on both reciprocity
compliance (!) and the possibilities to push it, but I didn't expect it
to be *that* extreme. A quarter of an hour, still no reciprocity
failure ? Wow.
>I wonder how did you calculate the aperture of the pinhole ?
I have a hole of exactly 0.1 mm and the distance to the film is about 5
cm. 50/0.1 = f/500.
--
Peter Leyssens
Eonic Systems
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