Just grabbed a GH4 today and gave it a quick low light test next to the 5D Mark 3!
I tried to make this the fairest possible test:
There are a lot of curve, contrast cine & dynamic range options in the GH4 that influence the noise levels in the image (and give you INSANE dynamic range), so I stuck to the following settings to really compare the sensor performance:
Picture Profile standard, contrast -5, sharpness -5
Hilights & Shadows default(0,0)
Picture Profile standard, Sharpness minimum, contrast minimum
Both cameras are at ISO 6400.
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