I have been trialing Phase One's C1 to process raw files from a Fuji S2
camera.

Both C1 and Photoshop's colour controls use two sliders for colour.
One is a yellow/blue control graduated in degrees Kelvin, and the other
is a magenta/green control graduated in +/- values. Both controls would
be very familiar to users of a colour temperature meter.

Entering the same values into both programs produces different files,
the C1 result being more yellow than the PSCS version of the same file.

Isn't a value in degrees Kelvin a fixed colour of light? Or are the
numbers used in these programs irrelevant in absolute terms?

Tim Wheeler
www.wheelerstudios.com.au

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