Re: Canon Rebel XT, Nikon D50 or Pentax K100 best?

On 02 Sep 2006 21:55:33 GMT, Pierre Vandevennne
<pierre@xxxxxxxxxxxxxxxxx> wrote:

Chris L Peterson <clp@xxxxxxxxxxxxxxxxxx> wrote in
news:29mjf2ta9hbma4lhvehp0g2uk6u7b6mr29@xxxxxxx:

In all cases I'm aware of this is done after the sensor is read, but in
principle it could be done inside the sensor,

How? Just curious.

The charge might be multiplied before the readout amplifier, which would
mean that the readout noise wouldn't change with ISO setting. There are
some so-called zero readout noise sensors that use a similar technique
(but the devices are currently exotic and mostly experimental; I doubt
anything like this is done in any consumer cameras).

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com
.

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