Camera Field of View Calculator
Find a lens's angle of view.
Field of view is how wide a scene a lens captures, set by sensor size and focal length.
The math behind it
FOV = 2 x arctan(sensor width / (2 x focal length)). Longer lenses see a narrower angle.
Worked example
Full-frame 36 mm sensor with a 50 mm lens gives about 39.6 degrees.
FAQ
Why does sensor size matter?
A larger sensor captures a wider view at the same focal length.