The photo on top was taken with my phone, the Samsung Galaxy S3 (file info claims f2.6, 1/15s, ISO 800), just for reference on how dark it is in here. My perception is that the room is slightly lighter than this, but certainly not as light as the bottom photo. The bottom photo is from my Canon EOS 5D mk.III (f4.0, 1/100, ISO102400).
This isn’t meant as a comparison of the two cameras. The first image is only meant as a reference of how dark the room is. And 100th of a second is a fairly fast shutter; I can reliably take sharp photos at half that speed and can occasionally get a passable photo at even slower (and with how grainy this is, it wouldn’t much matter). It’s essentially night vision.
And while the video does not go as high in the ISO range (it “only” goes to 25600), filming at 30fps means the shutter speed needs only be 1/30th of a second. That’s about three times the exposure time, at 1/4th the ISO, so the images are pretty close.
This is what I mean by having grown out of my original Olympus Evolt E-500. It served its purpose; it was cheap, it got me shooting, I learned a lot, and occasionally got a good shot, but it was like wringing blood out of a stone in comparison to this camera. Of course, there was about 5 years of technological development between the two, but you’re never going to get this type of performance out of Olympus’ tiny sensors. If you’re serious about photography, you need a full-frame camera.