Shooting a promo piece for Tigi at 194.36 fps on the Red Epic Dragon.
Flowing hair, cloth and ribbons begin to move gracefully at this frame rate.
This is the maximum frame rate on the camera at 2.5K, and it's at this resolution where I find the Dragon still delivers a great picture for a 1080 delivery.
I find if you run the ISO low ( I ran at 400 ISO) and drop the compression to its lowest, the pictures are fantastically clean and sharp.
You are obviously asking a lot more of your S35 optics with the S16 crop at 2.5K, so I wouldn't run lenses wide open.
I was shooting with this Optimo 30-80mm at T5.6 which held up perfectly at this stop.