I'm not a fan of DXO measurements however they are one of the few that have the data......The 64 and 100 ISO settings are software only ways to "push" the film You can get a similar experience by shooting at ISO200 with -1 or -2 exposure comp, and adjusting the exposure in post.
It should work in RAW mode, at the expense of dynamic range.
(Also, fyi, upgrade to 3.1, 3.0 had some initial bugs)
Thanks Matt,From page 197 of the Olympus EM1.2 manual (version 3):
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DXO graphs are a little misleading i think. If you hover over the dots, you'll see that the dot on the far left that you think is iso 64, is actually "measured 83, manufacturer iso 200". It doesn't look like they tested the lower 64/100 in my quick scan of the info.
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I don't use 64/100 iso on the camera.
I fully agree. I most often use L64 or L100 when using flash for portraits and I want to use f/1.2 or 1.4. They're also handy when wanting to slow the shutter speed as much as possible. Whatever the dynamic range is with these ISO settings, I do not hesitate to use them if they fit my need.Interestingly i use ISO64 a lot and find the files to be really good to work with and the behave like there is more range....