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CALCULATOR TOOLS

Useful Calculators

Magnification Calculators

Calculate the magnification of a telescope and eyepiece combination.

Calculate the magnification of a telescope and eyepiece combination.
Calculate the magnification of a telescope and eyepiece combination.
Calculate the theoretical maximum magnification possible with a particular telescope.

Focal Length & Ratio Calculators

Calculate the focal length and maximum magnification of your telescope.

Calculate the focal length of your telescope.
Calculate the focal ratio of your telescope.
Calculate the theoretical maximum magnification possible with a particular telescope.

Field Of View Calculators

Calculate the field of view of your telescope and eyepiece combination.

Calculate the actual field of view seen through the eyepiece.

Telescope Capabilities Calculators

Calculate your telescopes resolution.

Calculate the maximum resolving power of your telescope using the Dawes’ Limit formula.
Calculate the maximum resolving power of your telescope using the Rayleigh Limit formula.