Astro Fov Calculator 2021 Jun 2026

Save your gear configurations for quick planning sessions. Stellarium (Desktop & Mobile)

FOV (in degrees)=(Sensor Dimension (mm)Focal Length (mm))×57.296FOV (in degrees) equals open paren the fraction with numerator Sensor Dimension (mm) and denominator Focal Length (mm) end-fraction close paren cross 57.296 astro fov calculator 2021

The field of view (FOV) is the angular diameter of the sky that can be observed with a telescope or binoculars. It is usually expressed in degrees or minutes of arc. The FOV depends on the instrument's aperture, focal length, and eyepiece specifications. Save your gear configurations for quick planning sessions

To calculate the physical size of the sky your sensor captures, use this formula: The FOV depends on the instrument's aperture, focal

FOV (degrees)=(Sensor Dimension (mm)Focal Length (mm))×57.3FOV (degrees) equals open paren the fraction with numerator Sensor Dimension (mm) and denominator Focal Length (mm) end-fraction close paren cross 57.3

FOV (arcminutes) equals the fraction with numerator Sensor Dimension (mm) cross 3438 and denominator Focal Length (mm) end-fraction Note: Use 3438 for arcminutes or 57.3 for degrees. For Visual Observing (Eyepieces)