Yes, dynamic range decreases as sensitivity is increased. This is the nature of how the current sensor technology behaves, on all cameras.
On Tue, Aug 10, 2010 at 1:21 AM, Larry Colen <[email protected]> wrote: > I'm processing photos from the dance workshop this weekend. There were some > performances Saturday night that I shot at ISO 6400 with the K-x. This > allowed me to get reasonable shutter speed and depth of Field (f4.5 at 1/50), > but the skin tones are on the verge of blowing out. > My first thought when I saw the pictures in lightroom was that I had clipped > the highlights, but they aren't quite clipped, but almost all detail is lost. > It's almost as if rather than having 12 bits to express the full dynamic > range, they just multiplied the raw values by 8 so the same physical range is > expressed in 9 bits instead. > > Someone that has looked at the raw data of the K100 said that this was how > they did the high ISOs on it, rather than different circuitry between the > sensor and the A/D converter, so I can imagine this happening with the K-x at > 6400 as well. > > -- > Larry Colen [email protected] sent from i4est > > > > > > -- > 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. > -- Godfrey godfreydigiorgi.posterous.com -- 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.
