We know the Sony a7S has quite a bit of dynamic range and terrific low-light performance, but how does it stack up against the Panasonic GH4, and a much more expensive camera, the RED EPIC? James Drake, with some help from Dave Dugdale, took the camera for a spin along with his personal EPIC and a GH4, to see just how far he could push all of them in a scene with minimal light. Though the MX sensor in the EPIC is around 5 years old, it's interesting seeing how far the newest tech has come.
Here is the video from James Drake's post, with some still images below:
Our setup was using a Tamron 24-70 F2.8 on the Red Epic and A7s (via metabones adapter) and the 12-35 F2.8 on the GH4. All cameras were set to 2800k. We used Dave’s iphone at full brightness to key his face and the rest of the room was dark.
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Some ISO 3200 samples (click for larger):