1. Plus X with an expiration date of 2002 doesn't mean the film will be ruined on that date. I'm sure we all know this. What I'd like to add is that when I was s college film maker I bought some film that was 7 years out of date--or maybe it was 17. It had been in cold storage. I even think a lot of it was Plus X. I pushed it one stop (reversal processing) and it looked like tri X. In anycase there was nothing wrong with it-even several years after expiration. Just yesterday I printed on some Ilford Galerie paper that has to be at several years old. I put a little orthozite in the developer. Orthozite slows down the speed slightly but eliminates fog from age. With negative film this is even less a problem.
I only fear age in film for color (at least a year), fast films iso 400 (again a year) and transparency film (1-2 years max, 1 year for color critical extachrome). 2. re: Aerial cameras I defer to Gene's more inforamative posting. I have seen a couple of aerial cameras without glass over the film plane. I think Gene's point is that the Air Force has decided that vacuum backs are better solution than glass in front of the film. In useing glass contact printers, scanners, slide sheets, loupes, eyeglasses and thin plex dividers between negs and masks none of them are scratch proof, all of them collect dust all have short life expectancies. THe only short coming with vacuum backs I see are 1. Vibrating the camera or film. Air force cameras are very sturdy. and 2. Keeping the vacuum up during a long exposure. ---William Nettles [EMAIL PROTECTED] Nettles Photo / Imaging Site http://www.wgn.net/~nettles > From: [EMAIL PROTECTED] > Reply-To: [EMAIL PROTECTED] > Date: Wed, 24 Oct 2001 22:07:03 -0600 > To: [EMAIL PROTECTED] > Subject: Cameramakers digest, Vol 1 #238 - 11 msgs > > Hello all, > > Would anyone be interested in going halves on 1000ft. of 5 inch plus x? > There's an auction on eBay right now and I'd like to get it but 1000ft > is a lot of film. It expires in August 2002. > > Gene > From: [EMAIL PROTECTED] > Reply-To: [EMAIL PROTECTED] > Date: Wed, 24 Oct 2001 12:07:13 -0600 > To: [EMAIL PROTECTED] > Subject: Cameramakers digest, Vol 1 #237 - 8 msgs > > William and George, > > I don't have any direct knowledge of any nine inch roll film cameras, > but the 5 inch cameras I know of all have vacuum film platens. The > KS-87b, KA-93,KA-90,KA-95,KA-96, and KS-127 all use vacuum with the > spec being 1-8 inches of Hg, at a min of .25 cfm airflow. These cameras > typically operate in the 65-85 lp/mm resolution range with Kodak plus-x > aero film. > > Gene Johnson _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
