On Jun 6, 2010, at 1:13 PM, David Parsons wrote: > 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.
Exactly. > > 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. This is true. That's one reason I tend to convert to black and white. But I'd still like to have the best image to start with before converting. That's one thing that I should have mentioned, if I blew out the red channel, I'd just use the blue and green for the B&W conversion. > > 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. -- 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.
