Terry <terry@xxxxxxxxxxxxxxxxxxxx> writes: > Yes I have, and I know from experience that for the best possible > result you NEED to do a custom white balance, and do it according to > the Manf. recommendations, Canon recommends using a white paper, I > also know from experience that you get better results from Canon > cameras (The only ones I own) if you use white and not an 18% gray > card as recommended by some. > > Now for your test you will need to use some really off white balance > don't just use auto, which by the way does a pretty decent job, just > not as good as a custom. > > In my earlier post said I believe I read it in digital photo pro, I > will have to try and find it again, this came out some months ago, I > thought every one already knew about this "problem". > > I am curious though, just because they call it RAW or NEF or what ever > what would lead some one to believe that there was no real color data > contained in the file, nothing can just magically be what ever we want > it to be, if that where the case why cant we just go out and shoot > then go back to the computer and decided what speed it should have > been shot at? There has to be some information given to the > camera/computer in the first place and as you know garbage in = > garbage out. Um, we *can* go out and just magically decide what speed it should be shot at; that's what the "exposure" slider in ACR does, adjusts the ISO. Unless by speed you meant shutter speed, which obviously can't be fiddled later. The raw data is generally defined to be the actual A-to-D outputs for each sensor site on the chip. White balance is something applied by software in the camera after that. And I got sidetracked on running my own tests. I was thinking of deliberately creating a few thousand degrees Kelvin off for one version, maybe shooting tungsten under daylight, and a custom white balance for the second, and see how the raws compare. Maybe yet this weekend. -- 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/>
