Quote:
Originally Posted by Ramsees
Ok, thanks for this. little confused. I thought the smaller the pixel the better because I obtain more information and then I can zoom into the object a little to see the detail but if the pixels were big does this not create a pixelated image ??
|
Small pixels tends to mean more noise than large pixels. Large pixels get more light as they have a larger surface area so the signal to noise ratio tends to be higher if the read noise from the chip is reasonable.
As CCDs develop the read noise seems to be getting quite small (Sony CCDs for example seem to have about 1/3 the read noise of many Kodak chips). So the smaller pixels may still work on long focal length scopes as a result.
Greg.