On Wed, Mar 17, 2010 at 12:16:17PM -0600, steve harley wrote: > On 2010-03-17 11:07 , John Francis wrote: >> On Wed, Mar 17, 2010 at 09:56:11AM -0700, Larry Colen wrote: >>> >>> Another post processing question that's been niggling at me. Is there >>> any reason that a program like lightroom couldn't do binning, and turn >>> 14MP K20 files into 7MP files with twice the dynamic range? >> >> Yes - the laws of physics. >> >> Two 14-bit pixels binned together give you one 15-bit pixel (with a 7% >> theoretical maximum improvement in dynamic range), not a 28-bit pixel. > > dynamic range is based on the number of possible values, not on the > number of bits representing those values, so one additional bit > (regardless of the starting number) represents a theoretical doubling of > dynamic range, at least on a linear scale
Photographically speaking, dynamic range is generally quoted in f-stops. That's a logarithmic scale, not a linear one. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
