Kudos to Maestro Moose for such an elegant analysis and the lengths he went to
perform such an experiment. Can't say I fully understand the results, but
probably his method is the best way to test.
Such "older" sensors such as on the E-1 were noted for color accuracy and some
other pleasant rendering features but it is more difficult to quantify
objectively than one would think.
The sensitivity metamerism index (SMI) is defined in the ISO standard 17321 and
describes the ability of a camera to reproduce accurate colors.
The SMI varies depending on the illuminant and is independent of the
converter. Sonnie tends to do well here with a denser CFA but truth be told
the measure is noisy
above 80 and not very good at discriminating the sensors. Purples and true
violets are notoriously difficult. Oddly with OM5DII files I found taking
Marnie with true violet in the image worked much better with DXO conversion
then ACR in being able to portray the true violet with accurate skin tones.
Portra 160 had no trouble with a good scan. Admittedly I may not be practiced
enough with the HSL features, but I could not get it right in PS if I stood on
my head with the ACR conversion.
I don't understand the colorspace finding as usually found going from raw/tiff
16 bit to 8 bit jpeg in srgb an issue. I had an action from an FM'er to
prevent clipping but the aRGB processed always looked a bit washed out after
conversion.
like with the E-M5II in the Moose example. No clue why that doesn't occur with
the e-1. Smugmug does not support tiffs or aRGB so I I abandoned trying to
establish an aRGB gamut workflow though I would prefer to keep the files 16
bit with a wider gamut.
I don't member precisely what Zone-10 supports now but I believe supports at
least the wider gamut. As long as the image is going to be crammed into 256
flavors of each color it just seemed easier to keep things in sRGB like Chuck
recommended years ago not long after I joined the list. I hope to be able to
change that workflow some day.
Mike
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