ScopeWizard

ScopeWizard, sponsored by Sky-Watcher USA, is a collection of useful and common numeric calculators for telescopes, eyepieces, and cameras for use by amateur astronomers.

There are numerous formulas for computing the specifics of your telescope, eyepieces, and camera's characteristics when used together. ScopeWizard brings those formulas together in one handy place. An included database of telescopes, eyepieces, and cameras can be used to mix and match your equipment, or you can enter custom values manually.