I don't work with transparencies and never have to any great degree, but as
an educated guess I'd say you'd be on safer ground using the fastest
emulsion and then pushing that as little as possible. Latitude of exposure
for slide film is not all that wide (call it half a stop) and pushing a
film multiple stops all but guarantees no little discrepancy in that
respect. I'm not a mathematician, but wouldn't these discrepancies be of
geometrical proportion as they graduated (accumulated) from one to the next?
Anyway, the rule of thumb has been to use the film speed which comes
closest to your need and to push as little as possible. And that's with the
much more flexible negative film emulsions in mind. I can't imagine it's a
good idea to push slide film when not absolutely necessary, but again, I
know next to nothing about that side of it. I wouldn't do it, though.
Tris
Olafo
Are you serious about pushing provia F 400 to 3200? Has anyone tried this?
I'd love to know - I often find myself in places where I need 3200 ASA
even with the 50/1.2 wide open (museums, tombs the usual). I usually push
the 800 ASA fuji , i find it gives better prints than the 1600 pushed.
And being a huge provia fan, I have buckets of the stuff in my gadget bag...
ANy other suggestions for 3200 slide film?
Cheers
Pete
--
---------------------------------------------------
Dr. Peter Dixon
Neurogenetics Unit, Department of Clinical Neurology
6th Floor, Institute of Neurology
Queen Square
London WC1N 3BG
Tel: 0207 837 3611 xtn 4305
Fax: 0207 278 5616
Mobile: 0775 484 1984
email: P.Dixon@xxxxxxxxxxxxx, peterdixon@xxxxxxxxxxxxx
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