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08-15-2007, 03:10 PM   #1
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High kelvin Temperatures

This one has me baffled. The temp in K when I shoot DNG is alwasy 7150. Regardless of any adjustment made. Can anyone help me on this one. My D200 will be in the 4800-5400 K range for RAW. Any Hints ,tips or solutions.
TedP

08-15-2007, 04:25 PM   #2
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What is a D200?
08-15-2007, 04:51 PM   #3
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QuoteOriginally posted by TedP Quote
This one has me baffled. The temp in K when I shoot DNG is alwasy 7150. Regardless of any adjustment made. Can anyone help me on this one. My D200 will be in the 4800-5400 K range for RAW. Any Hints ,tips or solutions.
TedP
Which camera? Which converter? I know when RSE was released there were numerous glitches re: the reported Kelvin color temp w/ all sorts of cameras.
Not that you'd be using RSE/RSP.
08-15-2007, 05:30 PM   #4
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QuoteOriginally posted by TedP Quote
This one has me baffled. The temp in K when I shoot DNG is alwasy 7150. Regardless of any adjustment made. Can anyone help me on this one. My D200 will be in the 4800-5400 K range for RAW. Any Hints ,tips or solutions.
TedP
Is this true even when you manually set color balance? Does the in camera show the temperature relatively fixed as well?

08-15-2007, 05:56 PM   #5
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Nick D200 = Nikon
I use Adobe DNG converter not raw shooter and yes even when I I set Color balance
Ted
08-16-2007, 09:45 AM   #6
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I have experienced the same thing so I did a colour calibration on the K10D using a McBeth Colour Checker and then ran the image through Photoshop CS3 and then entered the custom profile into Camera RAW 4.1 and use that as the default when doing DNG convertions. My color temperature show as in the 6800 range and slightly higher, but the colours apprear very accurate on my calibrated CRT monitor. I remain interested in why, but decided that after seeing the results I did not really want bother to find out.
08-16-2007, 03:19 PM   #7
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Agreed the color renditions are accurate and I don't want to change anything I just want to know why. Thanks for the reply I know I'm not the only one that noticed

Ted
08-19-2007, 02:54 PM   #8
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Have exactly the same issue with the .DNG Raw files from my GX-10 - Kelvin temperatures seem very high but colours look good.

The downside to this is that I'm unable to use the "preset" white balance options in ACR4.1 as they produce colours which are way-off

simon

08-22-2007, 03:35 PM   #9
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Simon

Thanks for the reply. Maybe we can get an answer from somebody. I've found I can bring the K temp down to about 5900 and still get good colors(colours).
Still looking for an answer

Ted
08-22-2007, 06:44 PM   #10
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It's not clear if you are shooting PEF and converting to DNG or shooting DNG directly. In any case if your using Windows I would suggest you shoot some PEF's and use UFRaw, a graphic interface version of Dave Coffin's DCRaw, as a test. UFRaw is free and can be downloaded from Sourceforge.net ( UFRaw - Home ).

I shoot PEF but use ImageIngester to download and it converts my PEF's to DNG via Adobe's DNG Converter. I generally use the DNGs as my work files and keep the PEFs as the archive.

I use Lightzone 3.0 as my primary editor and normally find no difference in LZ's default conversion of the PEF vs the DNG. However, the have been instances where I did not get the image I was looking for even with post conversion edits. Here, I found UFRaw to be the answer.

Dave Coffin's DCraw is widely acknowledged as one the the best raw conversion programs and it can handle virtualy every Raw format out there. However, prior to UFRaw it was a Windows command line program (think DOS on 1980's x86PC). Dave deserves kudos for the work he as done and ( Udi Fuchs Udi Fuchs Photography homepage ) for the GUI version. WELL DONE GUYS!!!

Last edited by dmdctusa; 08-23-2007 at 07:31 AM.
08-27-2007, 11:16 AM   #11
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High kelvin Temperatures - Update & Silky Pix

Hello all...

I originally intended to post further analysis of this issue here but in view of my findings and subsidiary comment I decided to create a whole new thread.

The link to the post is: https://www.pentaxforums.com/forums/general-pentax-photography/11189-k10d-6-m...n-matters.html


David

Last edited by dmdctusa; 08-28-2007 at 06:23 PM.
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