Hi Peter, No, you changed that to "almost exactly", which I saw after my post <g>.
Anyway, I found the article where I read the assertion, and am looking into the matter now. Maybe we can get this clarified a bit. Also, I put up a page of filter factors for Kodak B&W film, but it didn't contain information on the chromogenics. In the article from Kodak that you quoted http://www.kodak.com/cluster/global/en/consumer/products/techInfo/f15/index.shtml#49741 There was a table of filter factors for KODAK Black & White + 400 Film. I've not yet compared that to the other B&W emulsions that are listed on my site, but I will later today. Perhaps that might shed a little more light on the subject. If you, or anyone else would like to make the comparison, here are the URLs: http://home.earthlink.net/~belinkoff/cameras/filterfactors.html and http://home.earthlink.net/~belinkoff/cameras/kodak-c41-bw.html Peter Alling wrote: > > I guess you didn't see my correction, I changed that to "almost the same". > > I agree that there is a question of the way the technology is applied. > If the film has a single photo sensitive layer, as I assume is true to most > conventional b&w films are then the response of the film to filtration > would depend on a single color response curve, (I don't know if that > terminology > is correct but there is such a curve describing the emulsions sensitivity > to various > wavelengths). In that respect chromogenic b&w film would really be no > different > from any other B&W film, each different emulsion will respond a bit > differently > within a general range. If for some reason the film has > multiple photo sensitive layers as in a conventional color film then the > results will be a bit more complicated. Then you would have to take into > account the color response curves of each layer, but even then I could assume > that changing the color balance of the light would have a similar effect on how > those colors were rendered in grey scale. I can't imagine that other > manufacturers have uncovered a secret to change that fact. -- Shel Belinkoff mailto:[EMAIL PROTECTED] http://home.earthlink.net/~belinkoff/ - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
