Archived posting to the Leica Users Group, 2006/09/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Robert, I understand the linear part and the 50% of tones within the first (brightest) stop. I don't follow why UNDER exposure causes loss in that stop. Isn't the underexpose method meant to preserve as many of those tones as possible? Then you are going to adjust your tonal range after capture so that the 256 possible are chosen from the ones you have captured. In other words, a nice smooth histogram with no gaps after you manipulate the image. I think this is the key point not being considered and resulting in the polarised viewpoints. Not what the file will look like un-altered afterwards to compensate for the underexposure, but how many tones you have captured. If a "normal" exposure results in clipping say half of the brightest f stop approaching 255, aren't you losing far more tones than clipping half a stop from the bottom approaching 0? There must be something I am missing here, and I really want to understand. Cheers Hoppy -----Original Message----- From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org [mailto:lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On Behalf Of Robert Schneider Sent: Wednesday, 20 September 2006 12:23 To: Leica Users Group Subject: [Leica] Re: "the dynamic range of digital" B. D. Colen wrote: And of course, if one routinely underexposes by a stop, one is not only avoiding overexposure, one is also discarding about 20 percent of all the information captured by the sensor. ;-) Actually, because of the linear nature of digital capture, it's more like throwing away about 50 percent. Whatever floats your boat. . . . rs _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information