William Robb wrote: > One of the things I keep reading WRT how good digital capture is relates > to the lack of grain in the digital capture. I do have a problem > understanding this. It seems to me that in order to have a "grain" free > image, the capture would have to be a continuous tone device.
This brings up a point which I've been wondering about lately. A digital camera pixel is continuous tone. It measures the _intensity_ of the light that falls on it. As I understand it, a single film "grain" or dye cloud or whatever it is, is a discrete device: either its exposed or its not exposed, and the density of the exposed "grains" control the perceived tone - ie its some kind of a randomly arranged halftone process. If this is true, its little wonder that people say digital files have finer grain than film. And higher perceived detail. Cheers, - Dave http://www.digistar.com/~dmann/
