This was a very quick test we did with the FS700 and it's super slow motion options. Both clips are shot at 480 fps which records 10 seconds of real time. The image quality is reduced when shooting in this mode. The camera can be triggered at the start, end, or 'end half' when shooting slow motion. Even with some quality loss, the 480 fps looked pretty good. We did test 960 fps and the image quality was obviously reduced.
We had a very strong LED light source which caused the magenta / green shifts.