Magnification, Field Of View, Exit Pupil and
Limiting Magnitude Calculator

Click here for a Secondary Mirror Offset Calculator.
Telescope Diameter: mm Telescope F/L: mm
Eyepiece F/L: mm Apparent Field: ° (?)

Limiting Magnitude¹: Magnification:
Focal Ratio: Exit Pupil Diameter³:
Rayleigh Limit²: Field Of View: