Archived posting to the Leica Users Group, 2004/07/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Adam, You don't really push or pull C-41 with these chromagenic films. Basically you are trusting to the really long characteristic curve of these films. At the low ISO settings you find more of the image from the shadows, lose detail in the highlights, and reduce contrast. At the high ISO settings you lose shadow detail and gain more detail in the highlights. The chemistry of C-41 films is fascinating. Each color layer is at least two; one of high sensitivity and one of low sensitivity. Within each layer is a chemical restrainer that doesn't let the density build up too fast or too far. The restrainers are why four stops overexposed can still produce flat but reasonable prints. Don dorysrus@mindspring.com -----Original Message----- From: lug-bounces+dorysrus=mindspring.com@leica-users.org [mailto:lug-bounces+dorysrus=mindspring.com@leica-users.org] On Behalf Of Adam Bridge Sent: Monday, July 19, 2004 7:29 PM To: Leica Users Group Subject: Re: [Leica] Re: Kodak BW400CN So how do you ask to have it processed if you're going to shoot at 50 which is pulling the film 3 stops. Do you then get an incredibly thin negative that's still scannable? I'm just curious because I haven't liked the resuilts when I shoot TCN at 200 wtih normal processing and I don't want to process it for 200 (read I'm too damn cheap and don't like to wait the extra time it takes.) Thanks for any thoughts. It's good to know that there is SOMETHING about this new BW400CN that people are liking. adam On Mon, 19 Jul 2004 17:14:10 -0700, JCB <jcb@visualimpressions.com> wrote: > At 04:55 PM 7/19/2004, Oliver wrote: > > >When I dropped off some color negative film at the New Lab today I asked > >whether they had formed an opinion on BW400CN, the successor to TCN400. I > >was told that the new film is sharper and has better shadow detail. The > >reply to my question whether the new film should also be rated at ISO 200 > >was, "most pros who want a little extra snap in the prints expose it that > >way." > >Oliver Bryk > >PS www.newlab.com is the leading pro color lab in San Francisco. > > > Like T400CN, BW400CN has a huge latitude. Kodak states ASA 50 thru 800 can > be used with confidence with normal processing. Of course, what you take > your light meter reading of (its reflectance) will make the biggest > difference in your results regardless of the ASA you use. > > Even though it is called "400", most folks find it marvelous at 200. As you > probably do. I have used it at both ends, 50 to 800, and have not been > disappointed. > > JB > > PS... www.calypsoinc.com (Calypso Imaging) is the leading pro color/B&W lab > in the south bay. > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information