On Wed, Jul 22, 2009 at 12:40:38PM -0700, Larry Colen wrote: > > It occurs to me, that I may have to change my metering technique going > from one camera to another. With the K100, I'll generally tweak the > exposure so that I don't blow out highlights, and use processing to > pull details out of the shadows. However, the area of each pixel on > the K100 is nominally 2.5 times that of the K20, so in theory, each > pixel has 2.5 times the dynamic range.
Nope. Signal-to-noise ratio only increases as the square root of the increase in sensor area, so the K100D could, at most, get 1.6 times the dynamic range (all other things being equal). But, of course, all other things are *not* equal - the difference in the sensor types and in the design of the processing circuits is far more significant. And, as others have pointed out, the active area of the sensor sites on the K20D is more or less the same as on the K10D, so the ratio is closer to 1.7 than to 2.5, for a signal-to-noise factor of only 1.3 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
