On 17 Mar 2005 at 2:12, Frantisek wrote: > J> Hmm... > J> Does anyone know which cameras that use the 16 Mpx and 22 Mpx siblings > J> of this chip? > > I think on luminous landscape there was a not bad (somewhat > surprisingly) review of MF backs, including some info on the sensors > and comparisons with EOS system. > > Also it's not only the sensor but mostly the electronics which can be > improved. Especially in CCDs where most of the processing > conversion is done elsewhere than the sensor, if I understand it > right. > > So a same sensor with better electronics can be a lot different.
>From what I've read some backs also employ Peltier cooling devices in order to reduce thermal noise in the sensors. The suggestion seems to be that in reality even with these big chips (9um square pixel sites vs 7.2um in the *ist D/s) there are only 12 usable bits to be had before cooling is employed. Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
