Telescope Capabilities Useful calculators and formulae.

Calculate the maximum resolving power of your telescope using the Dawes' Limit formula.   Formula:     116   /   Telescope Aperture  

Calculate the maximum resolving power of your telescope using the Rayleigh Limit formula.   Formula:     138   /   Telescope Aperture  

Calculate a telescopes approximate limiting magnitude.   Formula:     7.7   +   (   5   X   Log   (   Telescope Aperture (cm)   )   )  

Calculate the light grasp ratio between two telescopes.   Formula:     Larger Telescope Aperture ^ 2   /   Smaller Telescope Aperture ^ 2