Don't try for accurate colors in a bar setting. Just set a custom WB off a sheet of white paper with the light. If they have mixed light sources, you are not going to be able to balance for them all anyway.
If you hitting a limit at 2000K, you are deep into the red end of the lighting spectrum, and you will probably have problems with the light looking white without shifting the other colors. The only time that I get to anywhere near 2000K is when I'm shooting IR, and the colors will never look right. On Sun, Jun 6, 2010 at 3:16 PM, Larry Colen <[email protected]> wrote: > > On Jun 6, 2010, at 10:03 AM, J.C. O'Connell wrote: > >> Who cares? With my istDS,I quickly discovered the camera's >> LCD is of very high contrast such that if you shoot and adjust >> for a good middle exposure on the LCD, the RAW itself will be even better >> exposed to make custom JPEGS later from the RAW files adjusted by >> the test exposure LCD images. > > A couple of the bars that I've been photographing bands in have very wonky > color balance. So far out that lightroom can't correct because it only goes > to a color temp of 2000K. I'm trying to set the exposure so that I get the > very most info onto the sensor, without clipping. If I expose for red, then > blue and green are totally lost, so I need to push red as hard as I can, so > that I don't lose blue and green. > >> >> -- >> J.C. O'Connell (mailto:[email protected]) >> Join the CD PLAYER & DISC Discussions : >> http://tech.groups.yahoo.com/group/cdplayers/ >> http://launch.groups.yahoo.com/group/cdsound/ >> >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On Behalf Of >> David Parsons >> Sent: Sunday, June 06, 2010 10:04 AM >> To: Pentax-Discuss Mail List >> Subject: Re: Sensor native color balance setting? >> >> >> I don't see how color balance would make the JPEG and RAW match. The >> presets in the camera are what modify the JPEG file; sharpness, saturation, >> etc. If you set all the in-camera controls to neutral, they will be close >> enough most of the time. > > I need to know how each channel is being exposed. If I use the custom color > balance, the histograms come out a lot more balanced, even if the raw data > isn't. > >> >> Where you will see a difference is at the far right side of the histogram >> where highlights clip. Because the JPEG only has 256 levels, and RAW has >> 4096, the JPEG will show clipping far sooner than RAW will. > > because there are 16 values between where the jpeg clips and where the raw > clips? > Assuming that since the raw space is 16 times the size of the jpeg space, > that each jpeg value represents 16 raw values. > >> >> If you really wanted an accurate histogram (there's not much point of >> matching JPEG to RAW histograms when they have different amounts of data), >> you'd need to generate the histogram off the RAW data instead of using the >> JPEG preview. > > That is a feature that I've been wanting ever since I started shooting with a > DSLR. I use the histogram as my exposure meter, and I want it to reflect what > I'm actually exposing. Pentax seems to assume that people only ever use > their cameras in automatic exposure mode, shooting directly to jpegs. > > >> >> On Sun, Jun 6, 2010 at 2:50 AM, Larry Colen <[email protected]> wrote: >>> The problem with the histogram is that it shows the exposure of the >>> jpeg, not of the raw sensor. >>> >>> It seems to me that if you set the camera to the sensor's raw color >>> balance, then the jpeg and the raw file histograms would match. >>> >>> Anybody know what that setting would be? >>> >>> -- >>> Larry Colen [email protected] sent from i4est >>> >>> >>> >>> >>> >>> -- >>> PDML Pentax-Discuss Mail List >>> [email protected] >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >>> follow the directions. >>> >> >> >> >> -- >> Aloha Photographer Photoblog >> http://alohaphotog.blogspot.com/ >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. >> >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > Larry Colen [email protected] sent from i4est > > > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- Aloha Photographer Photoblog http://alohaphotog.blogspot.com/ -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
