"Emily L. Ferguson" <elf@xxxxxxxx> writes: > RAW files are only twice the size of jpegs on my camera anyway. RAW > is a compression too. 6x on mine (a clear-cut flaw in the camera; it's because too much processing is done before the "raw" file is written). Raw files "should be" 1.5 x megapixels in bytes, assuming actual 12-bit data and a real raw file that stores the actual sensor values for each pixel, before processing. Well, plus some minor overhead for EXIF-type data and a thumbnail, and minus whatever lossless compression may be applied. My Fuji S2 is a 6 megapixel camera, so the raw file ought to be about 9 megapixels, but it's actually 12. I'm pretty sure they do the interpolation up to a rectangular grid in the camera, and write the "raw" file as if it's a 12 megapixel camera (and then the compression balances out the 1.5x). Dunno if the details are true, but the raw files definitely are 12 megabytes, which apart from anything else, take *forever* to write to the card! And I can't check the histogram until the write is complete. As I say, this is the one clear-cut design flaw in this camera. (I suspect that they wanted *not* to leave the interpolation from diamond grid to rectangular grid to external software, perhaps thinking it would limit third-party support for their raw format. They may even have been right about that part.) -- David Dyer-Bennet, <mailto:dd-b@xxxxxxxx>, <http://www.dd-b.net/dd-b/> RKBA: <http://noguns-nomoney.com/> <http://www.dd-b.net/carry/> Pics: <http://dd-b.lighthunters.net/> <http://www.dd-b.net/dd-b/SnapshotAlbum/> Dragaera/Steven Brust: <http://dragaera.info/>
