Telescope focal length determines image magnification. Field of view (FOV) shows how much sky your telescope displays. FOV is calculated using telescope and camera/eyepiece specs. Match telescope FOV ...

The magnification (or power) you will see through a given optical system depends on the telescope and the eyepiece. The simple formula is: Magnification = Focal length of telescope ÷ focal length of ...

A do-it-yourself Galilean telescope makes an excellent and inexpensive starter telescope — or science fair project. When you purchase through links on our site, we may earn an affiliate commission.