Some scenes have been filmed with FPV. The GoPro Hero 3 with medium FOV, in my opinion, makes the video look better and probably helps avoiding jello and vibrations in comparison to recording in narrow FOV. I used the ND filter (3 stops) too.
Here you can see the difference between the original footage (1080, 60fps, M FOV) and the results removing the fish eye with the lens distortion effect (value: -15). In my opinion recording in M FOV helps preventing the jello effect and makes the footage look nicer.
http://niropter.blogspot.com/2014/07/removing-gopro-fish-eye.html
Setup:
Frame Tarot Iron Man 650
Maytech 620kv motors
30A T-Motor 400Hz ESC for multicopter
13x5.5 Carbon fiber propellers
Naza M Lite with GPS
DIY visor for GoPro and ND filter 3 stops
GoPro H3 black, 1080x60, M FOV
5200mAh 3S 35C battery
Futaba R6208SB receiver
Fatshark FPV camera
Fatshark Predator goggles
ImmersionRC 600mw Tx
1000mAh 3S 20C battery for video Tx
Gimbal Tarot T-2D
500mAh 3S 20C battery for gimbal
Futaba 8FG Super Transmitter