Archived posting to the Leica Users Group, 2004/07/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Don, Fascinating about the chemistry. So are you saying that in some ways you can think of these films rather like digital media in that you can effectively change ISO within a single roll and you should get something usable without compromising neg quality too much? Peter Dzwig Don Dory wrote: > 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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >