Archived posting to the Leica Users Group, 2011/08/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I think quite a few people misunderstood my question. Probably my fault for not being crystal clear. I was not asking for advice, but for information and explanations from anyone who knows some answers. One answer should be available from quite a few of you: that question was: does the white balance setting in a camera directly affect raw files in any non-leica you know of. Now, I don't believe a mini-file of white balance setting rides piggy-back on raw files the way EXIF info does on many SLRs. So forget that explanation of what I observed. Let me repeat what I observed: I found on the MAC two independent applications which will render visible in all its glory the picture contained in a raw or DNG file. And when I set different white balances in the M9, the same shot taken at different white balances show up as having different balances when the DNGs are viewed with either of these apps. Finally, they look equally different when viewed in LR3 without any corrective actions, just as the come after import. I also did some speculation. I have always been curious about just what the hardware does when you change the ISO and theorized that maybe higher ISO is obtained by increasing the voltage on the sensor. I then speculated that if this is what in fact is done, then an a priori white balance could be modified by modifying the voltages applied respectively to the red, blue, and green sensor groups. Just guessing, but if anyone actually knows, I'd like to hear from them. Finally, to make it clear that I was just looking for understanding, not advice. I'm perfectly happy to leave the camera setting on "auto and make any needed adjustments in LR. And, I'm convinced that there are occasions when there are adjustments that can be made in Lightroom or Aperture to raw that cannot be made, or at least made as well, to jpegs. Certainly that has been emphasized in more than one book on Lightroom. Herb > >But I have a feeling this isn't what Herb was asking.... >Bob Adler >Palo Alto, CA >http://www.rgaphoto.com > > > > >________________________________ >From: Robert Meier <robertmeier at usjet.net> >To: Leica Users Group <lug at leica-users.org> >Sent: Sat, August 13, 2011 8:49:42 PM >Subject: Re: [Leica] M9 color balance > >It was the 'again and again' I was questioning. > > >On Aug 13, 2011, at 10:40 PM, Richard Man wrote: > > > Because there may not be one correct white balance? e.g.indoor with > > multiple light sources. > > > > That's besides the point though, the point is that the raw file data > > is not changed, whether it's WB, or cropping, or dodge and burn etc., > > if you use something like Lightroom, Aperture or something similar. > > > > On Sat, Aug 13, 2011 at 8:36 PM, Robert Meier ><robertmeier at usjet.net> wrote: > >> Why on earth would anyone want to change the white balance again and > again > >> in post processing? > >> > >> > >> On Aug 13, 2011, at 10:33 PM, Richard Man wrote: > >> > >>> That's the beauty of a raw file, even if the WB setting is tagged to > >>> the file, it does not change the data in the file itself, so you can > >>> change it again and again in post processing. > >>> > >>> On Sat, Aug 13, 2011 at 7:31 PM, Herbert Kanner <kanner at acm.org> > wrote: > >>>> > >>>> Not true. I saw the rendering of the DNGs three ways. First, which an > >>>> application called "Just looking" which directly displays a >DNG", second, > >>>> a > >>>> contextual menu on the Mac which produces something called "Quick > Look" > >>>> whose appearance is the same as the first thing I just mentioned, > but it > >>>> works quicker, and, third, the appearance in LR3 before I apply any > >>>> corrections. > >>> > >>> > >>> > >>> > >>> -- > >>> // richard <http://www.imagecraft.com/> > >>> // icc blog: <http://imagecraft.com/blog/> > >>> // richard's personal photo blog: <http://www.5pmlight.com> > >>> [ For technical support on ImageCraft products, please include all > >>> previous replies in your msgs. ] > >>> > >>> _______________________________________________ > >>> Leica Users Group. > >>> See http://leica-users.org/mailman/listinfo/lug for more information > >> > >> > >> _______________________________________________ > >> Leica Users Group. > >> See http://leica-users.org/mailman/listinfo/lug for more information > >> > > > > > > > > --// richard <http://www.imagecraft.com/> > > // icc blog: <http://imagecraft.com/blog/> > > // richard's personal photo blog: <http://www.5pmlight.com> > > [ For technical support on ImageCraft products, please include all > > previous replies in your msgs. ] > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information -- Herbert Kanner kanner at acm.org 650-326-8204 Do not meddle in the affairs of cats, for they are subtle and will pee on your computer!