Field of View Calculator
Really helps to fine tune your camera settings.
I sit approx 36 inches from the screen
I use the Helmet Camera set at 65 with Show Helmet set to "No" & Look to Apex set to 40
FOV Speed Sensitivity - Yes
Minimum - 75
Maximum - 140
Minimum Speed Sensitive Speed - 54
Maximum Speed Sensitive Speed - 178
What this means:
Sitting in the car, at 0 mph my field of view is 65 degrees. This is enough to see the driver side A-Pillar, but not the mirror. As I accelerate, the FOV adjusts to 75 degrees at 54 mph, then to 140 degrees at 178 mph. I'm still tweaking the settings to find a good balance.