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v3.7.4 STILL has wrong color temp for P45

michaelefox
v3.7.3 displayed the wrong color temp for the P45. We were told v3.7.4 would fix this. Apparently, it's still not fixed!

Installed v3.7.4 for Windows
Opened a session which contains P45 shots taken outdoors.
Set Color Profile to new P45 Outdoor Daylight profile
Used white balance tool on a shot which contains a WhiBal card.
Color temp reads 9600K when shot was taken mid morning and not at altitude. That just can't be.
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Comments

4 comments

Date Votes
  • Andrew Michael
    Is this just a problem with the P45 or is it more general? I was using a hired P20 the other day with C1 3.7.3 and it consistently reports wrong colour temperatures compared to my 1Ds2 when set from the same WhiBal ....

    Andy
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  • michaelefox
    I don't know since I use Adobe CR for my Nikon stuff and it just works. Perhaps others can comment.

    I just did another test with the P45 and included a color meter in the shot so the P1 guys could see the correct value. Also included two different brands of gray cards - WhiBal and Robin Meyers, lest someone say the gray card is at fault. The actual color temp of the shot is 5840K. But after using the white balance tool in C1, the color temp reads 9000K!

    In a response to reporting this problem on v3.7.3, I was told that the color temp was known to be off by about 2000K. in v3.7.4 it's even worse! Maybe someone added when they should have subtracted.

    White Balance is such a basic and necessary function for a digital camera/software workflow. It amazes me that P1 can't get this right for their own cameras. Pretty sad for a $32K back and $500 software.
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  • michaelefox
    BTW, I just noticed that the Tint value is also off.

    The color meter indicates 0cc of correction needed while the C1 Tint value reads 4.
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  • Larry22
    I'd like some more guidance from Phase on this one. With my P45 back, the color temperature readings that appear on the WB tab, are much higher than what a typical daylight scene appears.

    I've compared these readings to my D2X processed in C1, and the readings for WB temp from a D2X appear \"normal\". Yet the P45 is several thousands more K in temp.

    The only solution I have that only works sometimes is to shoot a WB card. However, often in landscape / outdoor photography, the subject is a long ways away from where you're shooting from and you can't place a WB card in the scene.

    Therefore, I have no choice to move the sliders during post-processing. Then between the variability of the temperature readings and the sensitivity of the tint control, i have a difficult time getting the shot into a \"reasonable\" WB range.

    I'm sure for studio shooters, a WB card is all that is needed to set a collection of photos. I don't have that luxury.

    Any suggestions from Phase? The problem occurs with both the PC and MAC versions of 3.7.4.

    Larry
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