I just spent a day trying to get a dt style that would work for OM-3 raws (not that there hasn’t been a huge improvement in OM camera raw handling in 5.x, for which I thank the devs), but was ultimately unsuccessful at getting something useful. Some comments:
- darktable-chart is rigid and uninformative about ‘errors’ in .cht files. As noted here, stray tabs on a ‘blank’ line will cause parse errors with no help.
- one comment in the linked thread (or another, maybe) was that the 24 tile SpyderChecker chart wouldn’t be enough, and that may be correct - I can’t tell - but the output, while close wasn’t as bright or saturated in some areas, and my lame attempts to patch that and some color shifts just made it worse.
- So, Olympus/OM color science can’t be contained in SpyderChecker24 charts, I guess, and I do like it.
On a side note, if anyone cares, the scene-referred default sigmoid, color calibration, and exposure settings are pretty good. I most often adjust exposure a bit, and always turn on local contrast, and that gets me very close to most OOC JPEGs.