On Monday, November 25, 2002, at 05:38 PM, Michael Wilkinson wrote:
I've maybe been away from the sharp end for too long to be expert any more, but based on my knowledge of 3 1/2 years ago there are pros and cons on both type of sensor.I've understood that CMOS is inferior to CCD ,Are things changing ? RegardsMichael
The advantage of a CMOS sensor is that it is possible to control on the sensor the output of each individual pixel, therefore the control of noise is much enhanced. They also generate significantly less heat than a CCD (and heat has a direct effect on noise). They are also much cheaper to produce and with further saving on the ability to mount the entire works (ie the analogue/digital convertor) direct to the chip rather than having it as a separate assembly as on a ccd chip.
On the negative side, it is much more difficult to achieve greater bit depth and light sensitivity on a CMOS chip.
Obviously these negatives are being progressively overcome.
I'm sure someone more knowledgeable than me will now put me right :-)
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Best,
Francis Newman
Webshot Ltd, UK
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