Telescope Field of View Calculator
Free calculate field of view (fov), apparent field of view, and true field of view. determine fov from eyepiece apparent fov and telescope magnification.
Input Parameters
degrees
Typical: 40-82 degrees
×
Results
Enter AFOV and magnification to calculate FOV
Field of View Formula
True Field of View
TFOV = AFOV / M
Where:
- • TFOV = true field of view (degrees)
- • AFOV = apparent field of view (degrees)
- • M = magnification
Typical AFOV Values
- • Plössl: 50-52°
- • Wide angle: 60-70°
- • Ultra-wide: 80-82°