Camera Sensor FOV Calculator — Formula
## Camera Sensor Field of View
The angular field of view determines how much sky the sensor captures.
### Formula
**FOV = 2 arctan(d / 2f)**
- *d* = sensor dimension (width or height) in mm
- *f* = telescope focal length in mm
Convert from radians to degrees by multiplying by 180/pi.
The angular field of view determines how much sky the sensor captures.
### Formula
**FOV = 2 arctan(d / 2f)**
- *d* = sensor dimension (width or height) in mm
- *f* = telescope focal length in mm
Convert from radians to degrees by multiplying by 180/pi.
Exemplo Resolvido
APS-C sensor (23.5 mm width) on a 1000 mm focal-length scope.
- FOV = 2 * atan(23.5 / 2000)
- FOV = 2 * atan(0.01175)
- FOV = 2 * 0.01175 rad = 0.02349 rad
- FOV = 0.02349 * 180 / pi = 1.346 degrees