Archived posting to the Leica Users Group, 2001/07/24
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Very interesting -- I saw the magic words "reduce silver content" so it of course will be done by film manufacturers! Robert Monaghan wrote: > don't give up on film quite yet, see ten times faster film emulsions page: > http://www.cnrs.fr/cw/en/pres/compress/emulsionsphoto.html > > quote: The yield is then _eff = 2 silver atoms per photon, i.e. 10 times > higher than prior yields. The mechanism is such that the number of atoms > is proportional to the number of photons in a very wide range of light > intensities, including zero or low exposure, and that the sensitivity gain > does not suffer from any accompanying fogging effect. endquote: > > it is also unlikely that future digicams will be able to use much smaller > sensors due to issues like wavelengths of light and noise levels, viz: > http://www.dpreview.com/news/0009/00091102foveon16mp.asp > > quote:Mr. Mead said that because of fundamental size limits in the > wavelengths of light, it is unlikely that future digital sensors will gain > much additional resolution. endquote (Mead developed 16 MP Foveon chip) > > Assuming that Agfa et. al. come out with 10X faster films as hoped and now > evidently technically possible, with better linearity and less fogging, > that translates into 3+ stops speed for film, and about equal light > efficiency to current CCD sensors (unless you intend to supercool your > chips?). Granted, digicams will be able to do software tricks, and image > intensifying tubes or technology will be available (but also to film > cameras?). But the technology wars aren't over yet, and they aren't so > one-sided as many would have us believe ;-) grins bobm > > * Robert Monaghan POB752182 Dallas Tx 75275-2182 rmonagha@mail.smu.edu * > * Third Party 35mm Lenses: http://www.smu.edu/~rmonagha/third/index.html * > * Medium Format Cameras: http://www.smu.edu/~rmonagha/mf/index.html megasite*