I will check it out when I get home Friday. I get the feeling some settings changed on the camera since I last looked at the settings.
FYI, I have a Session4. The Hero4 has these options:
Sounds like the Session 4 has 170 deg. and 127 deg. I am shooting at 1080-60fps
GoPro is well known for its fish-eye effect – the way videos and picture bend round the edges. Otherwise known as barrel distortion, this is caused by the wide field of view (FoV) – 170 degrees is captured in front of the camera. The bending can look a little odd and if you want something with straighter lines you can narrow the field to something less curvey. You can change the FoV to 127 degrees, making the distortion less of an issue, but this option is only available for 1,080 and 720 resolutions.
Read more at http://www.trustedreviews.com/gopro-hero-4-session-review-setup-features-app-gopro-studio-page-2#5vQ1JEeQaVtqU5Fb.99