Archived posting to the Leica Users Group, 2004/07/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hey, Don, you seem to be forgetting that while the appearance of images doesn't change much with the better digitals up to about 800 iso, from image to image you have the options of altering white balance, saturation, sharpness, color range, etc. etc. - which is much like changing film stock as well as iso.... -----Original Message----- From: lug-bounces+bdcolen=earthlink.net@leica-users.org [mailto:lug-bounces+bdcolen=earthlink.net@leica-users.org] On Behalf Of Don Dory Sent: Tuesday, July 20, 2004 7:41 AM To: 'Leica Users Group' Subject: RE: [Leica] Re: Kodak BW400CN Peter, The films are useable from an ISO of 50 to 800 (possibly 1600 depending on your metering). Unlike digital, there are significant changes to how the image appears as you change ISO. This can be used for effect and especially if you are a PS guru can be substantially mitigated with the new shadow/highlight tool and the use of multiply in the layers menu. In digital, with the larger sensors, there is not much of a real image change from 50 to 400, some would say 800 effective ISO. Really oils or acrylic, pencil or charcoal, large displacement or turbocharged is the same question. How about that as a SAT analogy: oils are to acrylic as digital is to... 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 Peter Dzwig Sent: Tuesday, July 20, 2004 3:53 AM To: Leica Users Group Subject: Re: [Leica] Re: Kodak BW400CN 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 > _______________________________________________ Leica Users Group. 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