相机传感器视场计算器
使用此相机传感器视场计算器快速获得准确的计算结果。
mm
mm
Field of View
1.3464 deg
FOV (arcmin)80.78 arcmin
Field of View vs Sensor Dimension
公式
Camera Sensor Field of View
The angular field of view determines how much sky the sensor captures.
Formula
FOV = 2 arctan(d / 2f)
Convert from radians to degrees by multiplying by 180/pi.
计算示例
APS-C sensor (23.5 mm width) on a 1000 mm focal-length scope.
- 01FOV = 2 * atan(23.5 / 2000)
- 02FOV = 2 * atan(0.01175)
- 03FOV = 2 * 0.01175 rad = 0.02349 rad
- 04FOV = 0.02349 * 180 / pi = 1.346 degrees
常见问题
Should I use sensor width or height?
Calculate both. The width gives the horizontal FOV, the height gives vertical FOV. The diagonal gives the total angular coverage.
How does a focal reducer affect FOV?
A focal reducer shortens the effective focal length, widening the FOV. A 0.63x reducer on a 1000 mm scope gives 630 mm effective.
What FOV is ideal for deep-sky imaging?
It depends on the target. Large nebulae need a wide FOV (over 1 degree); small galaxies and planetary nebulae suit narrow FOVs (under 0.5 degrees).