Just digested and tried out the profiling (CS RAW calibration) method
described by Bruce Fraser and I'm struggling a bit!:
I downloaded the Gretag Chart, converted it to RGB and Adobe 1998 colour
space and then printed it to my (colour profiled) Epson 1290 (I use Lyson
Fotonic CIS and Lyson Smooth Fine Art paper which has a "slightly warm"
rather than pure white surface). The print generally looked good relative to
the downloaded screen image.
I then photographed this print (A4 size) under two different lighting
conditions: the first using direct on-camera flash and the second using a
couple of elinchrom monoblocs in a "studio" set-up.
First question: Is this OK or should I be photographing an original target
chart - if the latter; where can I get one?
Second question relates to the calibration method itself: can anyone offer
an example to illustrate getting the proportions of, say Red & Green values
relative to Blue for the blue patch if the measured blue value is wildly
different to the target value?
All help gratefully received!
Regards
Malcolm Jeffs




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