Mark Roberts <[EMAIL PROTECTED]> wrote: >"tom" <[EMAIL PROTECTED]> wrote:
>>they're 6 megs. When converted to 8 bit tiff, they're 18 megs. >> >>I thought a raw file was a sensor dump, and the size of the file >>should correlate with the size of the sensor? > >It should: 12 bits (1.5 bytes) per pixel for cameras that do 12-bit RAW. Just did some research on the web. Canon RAW files are compressed using a proprietary lossless compression algorithm. They claim it gets 9 megabytes of data into about 7 megs. Pretty limited compression but you'd expect that with the kind of data you'd get in photographic images. Now it makes sense :) -- Mark Roberts Photography and writing www.robertstech.com
