Managed to snag a couple crescent moon photos this evening. I got to say, it was nice shooting with this camera, I did notice the buttons are not quite where I am used to from the R or mkII, but for the most part, with the help of a light bulb I was able to find my way around.
Once again, I loaded up images with RawTherapee and found same decently sharp images. I tried a couple photos with the 1.4x extender but really didn't like those either with the 300mm f/4L IS or the sigma 150-600, so I ignored them. After all, this was more so just testing the camera out.
I did notice on almost all images, I had major purplish fringing especially in the horn area of the crescent. White balance issue? RT issue? 5dmkII issue? Lens issue? Not sure, I ended up doing a monochrome conversion to rid the purple cast. Trying to pull the image up in dark table to see if purple cast is there too.
And just looked in darktable, don't seem the purple cast is there. I wonder what is going on, native cr2 files for both. Actually, looking around a bit, the images seem to look a bit better in dark table...
Sigh... I don't know, one moment things seem to work good on this set up, the next... 
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