So we've recently acquired a Sony Alpha a7rii camera. It's small, it records 4K internally, it even does slow motion in HD. The camera is also very sensitive to light, so it does a lot better than the Blackmagic. But of course it only records in 8-bit 420. That means when you record in S-Log2, a very flat gamma curve, you need to expose your footage correctly in order to take the full advantage of the 14-stop dynamic range (DR) capabilities of S-Log2.
- Should only be used when you need 14-stop of DR.
- Should generally be exposed +1 or +2 stops above the camera recommended exposure. That allows to lower noise in the picture by bringing the shadows up. This leaves less headroom for highlights but there's still plenty of room.
- Don't push exposure over +2 stops over you lose details in skin tones and everything else in the brighter part of the picture.
- Generally Skin should be exposed b/w 45% (recommened camera exposure), 55% (+1 stop) and 70% (+2 stops). Or a white piece of paper should be exposed b/w 62% (+ 0 stop), 75% (+1 stop and 87% (+2 stop).
Alister Chapman is an expert on all Sony products, and I highly recommend reading his blog if you need a better understanding on all technical aspects.