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Adobe Camera Raw Q&A
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ACR colour temperature indication problem
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Topic: ACR colour temperature indication problem (Read 6077 times)
Dragan Novakovic
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Posts: 10
ACR colour temperature indication problem
«
on:
July 01, 2011, 09:25:30 am »
ACR consistetly displays much lower "as shot" colour temperatures than those actually set on my Panasonic LX3. What is more, the departure from the camera setting in ACR increases with temerature. By comparison, what Silkypix reports is almost spot-on. Otherwise, there is not much difference between the white balance of images shot at the same temperatures when opened in the two converters.
I hope that the following table is clear enough.
Camera setting ACR Silkypix
5000K 4450K (-550) 5008K (+2)
5100K 4500K (-600) 5102K (+2)
5200K 4550K (-650) 5180K (-20)
5300K 4650K (-650) 5287K (-13)
5400K 4700K (-700) 5380K (+3)
5500K 4800K (-700) 5493K (-7)
I must be doing something wrong because I don't believe that ACR can be this much off the mark. Thank you for your suggestions.
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fdisilvestro
Sr. Member
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Posts: 1854
Re: ACR colour temperature indication problem
«
Reply #1 on:
July 01, 2011, 09:58:50 am »
Different Raw converters show different colour temperature for the same image appearance
According to Eric Chan (from Adobe) there is no standard:
http://www.luminous-landscape.com/forum/index.php?topic=49904.msg411522#msg411522
The important issue is that your whites and neutral tones have R=G=B
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frankdisilvestro
Dragan Novakovic
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Posts: 10
Re: ACR colour temperature indication problem
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Reply #2 on:
July 01, 2011, 10:23:35 am »
Thank you very much for your post. This certainly explains it.
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digitaldog
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Posts: 20651
Andrew Rodney
Re: ACR colour temperature indication problem
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Reply #3 on:
July 01, 2011, 11:10:19 am »
A Kelvin value represents a range of colors (not an exact color).
Any color seen on the lines of correlated color temperature can be defined with a single (simple) Kelvin value:
FWIW, the two sets of lines here represent the tint and temp sliders you control in ACR/LR.
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http://www.digitaldog.net/
Author "Color Management for Photographers".
01af
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Posts: 296
Re: ACR colour temperature indication problem
«
Reply #4 on:
July 01, 2011, 11:19:44 am »
At least, the difference in the numbers indicated by Camera Raw are shifted pretty constantly by approx. +2,5 dekamired. And it's not a real colour shift but just an offset in the indicated numbers. So don't worry. It's just numbers on a slider's scale. Adjust to taste and be done with it.
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Dragan Novakovic
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Posts: 10
Re: ACR colour temperature indication problem
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Reply #5 on:
July 04, 2011, 02:43:33 pm »
Thank you all for clarifying this matter for me.
(By the way, I got my figures wrong in the third column under 'Silkypix' - they should
have been +8, +2, -20, -13, -20 and -7.)
Best regards
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ACR colour temperature indication problem
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