On Thu, Jan 14, 2010 at 8:57 PM, Graydon <[email protected]> wrote: > On Wed, Jan 13, 2010 at 10:43:09PM -0500, John Francis scripsit: >> On Wed, Jan 13, 2010 at 08:55:22PM -0500, Graydon wrote: >> > On Wed, Jan 13, 2010 at 08:47:27PM -0500, paul stenquist scripsit: >> > > Although they have the same sensor, the K7 seems to render shadow >> > > detail considerably better than the K20. Don't know why. Definitely >> > > more shadow detail and less noise. >> > >> > As I understand it, the K7 has the second generation; same resolution, >> > but different "wiring" of the sensors and more bits per pixel. >> >> Different wiring, yes - it has multi-channel readout for higher speed >> (and, as an added benefit, lower noise). >> >> Are you sure about that "more bits per pixel" ? > > I have these vague memories of 4 vs 2 and this actually being at risk of > increasing the noise while increasing the responsiveness. > > Could just be vague delusions, I do suppose. > > -- Graydon >
The K-7 has a 4-channel readout, the K20D a 2-channel readout, that's the 4 vs 2 you recall. The extra channels are necessary to achieve 5.2fps. This is not the bits per pixel which remains the same between the two bodies based on all info I've seen (final output is 12bpp, not sure what the ADC spec is originally). -- M. Adam Maas http://www.mawz.ca Explorations of the City Around Us. -- 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.
