What Is The Horizontal AOV Of A 360 Degree Fisheye Camera?

1. 360
2. 180
3. 0
4. Unknown, it depends on the lens/imager
5. Question is incoherent; fisheye lenses don't have horizontal or vertical AOV per se
6. Other

What about the vertical AOV?

What about for a 180 degree model?

Inspired by these comments.