Archived posting to the Leica Users Group, 2012/03/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]What Doug may be referring to this that every pixel has a filter on it. So the luminance value is interpolated. See PhaseOne's Achromatic+ for black & white photography The process of reproducing original black and white prints is extremely difficult with a full color process. The Achromatic+ back can reproduce original black and white with extreme accuracy that requires little or no post-production. The lack of filters on the sensor also provides the advantage of higher resolution. To take advantage of the extra resolving power, high-resolution lenses are required. Reproduction lenses are typically higher resolution thereby allowing the Achromatic+ back to provide the best quality possible. Improved optical performance can be achieved with special spectrum illumination systems, which have been developed for use with this imaging device. *** We don't know if this sensor, if exists, behaves like Phase One's sensor, but it's probably close as physics is physics On Thu, Mar 15, 2012 at 12:22 AM, Frank Dernie <Frank.Dernie at btinternet.com>wrote: > Which 2/3 Doug? > I understand the increase in sensitivity without the Bayer filter. I don't > understand why every pixel wouldn't still be used for the luminance data. > I.e. I get the loss of sensitivity to which you refer, but not the loss of > resolution. What am I missing? > cheers, > Frank > > On 14 Mar, 2012, at 22:28, wildlightphoto at earthlink.net wrote: > > > Sonny Carter wrote: > > > >>>> > > On Wed, Mar 14, 2012 at 4:27 PM, wildlightphoto at earthlink.net < > > wildlightphoto at earthlink.net> wrote: > > > >> To get B&W from an RGB digital camera you throw away 2/3 of the image > > data. > >> A B&W-only camera could be much more sensitive (higher ISO) and higher > >> resolution. > > > > Um, if you change the mode to BW, that is true, but if you simply > > desaturate the image, the file stays the same size, and I presume all the > > information remains. > > <<< > > > > And 2/3 of it is duplicate data, same as throwing it away. > > > > Doug Herr > > Birdman of Sacramento > > http://www.wildlightphoto.com > > > > -------------------------------------------------------------------- > > mail2web.com - Microsoft? Exchange solutions from a leading provider - > > http://link.mail2web.com/Business/Exchange > > > > > > > > _______________________________________________ > > 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 > -- // richard <http://www.richardmanphoto.com>