Just to add to Tom's excellent response, there is no correlation between paper and film ISO. I have seen differences between manufacturers with this, so even if there were then it would be tenuous, at best.
Of course, the right course of action is to test. Use a sheet of 5X7" in your camera and see what happens. I have found more "normal" RC papers to be about EI 1 or 2, with warm tone papers certainly being much slower.
Cheers -
george
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--- On Fri 10/08, Loris Medici < loris_medici@mynet.com > wrote:
From: Loris Medici [mailto: loris_medici@mynet.com]
To: pinhole-discussion@spitbite.org
Date: Fri, 8 Oct 2004 17:03:46 +0300
Subject: [pinhole-discussion] Converting paper ISO speed to film ISO speed...
<br>I plan to build a 11"x14" pinhole camera... I will use photographic<br>paper (B&W) as negatives.<br><br>1. Is there a method for converting Paper ISO Speeds to Film ISO Speed?<br>For instance, if the manufacturer rates the speed of a paper as ISO<br>P300, what ISO whould I rate this paper when using it as a film?<br><br>2. I hope the reciprocity failure is less drastic in paper when compared<br>to film... Is there any useful reciprocity failure tables online (for<br>B&W papers)?<br><br>Thanks in advance,<br>Loris.<br><br>_______________________________________________<br>Post to the list as PLAIN TEXT only - no HTML<br>pinhole-discussion mailing list<br>pinhole-discussion_at_spitbite.org<br>FAQ at http://spitbite.org/pinhole-discussion/list.html<br>
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Received on Fri Oct 8 09:26:00 2004
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