Discover how much of the night sky you can see with your telescope and eyepiece combination. Our Telescope Field of View Calculator helps astronomers determine both magnification and true field of view (TFOV) instantly, allowing for optimal stargazing planning. Understand your equipment better and enhance your astronomical observations.
Formula:
The calculator uses the following formulas:
- Magnification (M) = Telescope Focal Length (Ft) / Eyepiece Focal Length (Fe)
- True Field of View (TFOV) = Eyepiece Apparent Field of View (AFOV) / Magnification (M)
Where:
- Ft = Telescope's Focal Length (in mm)
- Fe = Eyepiece's Focal Length (in mm)
- AFOV = Eyepiece's Apparent Field of View (in degrees)
- M = Magnification (unitless)
- TFOV = True Field of View (in degrees)