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🔭 Telescope Field of View Calculator
Calculate the field of view and magnification for telescope observations
📐 Field of View Formulas
FOV = (57.3 × Eyepiece FOV) / Magnification
Magnification = Focal Length / Eyepiece Focal Length
FOV in degrees, Magnification in ×, Focal lengths in mm
Magnification:
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True Field of View:
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Exit Pupil:
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Resolution:
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💡 Tips & Information
- Larger exit pupils (>7mm) work best for dark skies
- Smaller exit pupils (<1mm) provide higher magnification
- Optimal exit pupil: 2-7mm for most observing conditions
- Wide FOV eyepieces (60°+) provide immersive views
- Consider your observing location's light pollution