Another type of reflector is the compound telescope, often called a SCT or a Schmidt-Cassegrain telescope. These scopes, which have been in use just since the 1970’s, use a lens and a mirror. The mirror collects the light, the lens at the front of the tube corrects for the spherical shape of the mirror and brings light to a tighter focus.
The great advantage of these telescopes is their compact size… they pack a lot of focal length into a small package. They’re fairly easy to set up, and they are great for general use. Though they do cost more inch-for-inch than Newtonians, if compact size is important, then an SCT is worth considering.
The scopes shown in this video are the best all-around telescopes for backyard astronomy. Many observers have been using their Meade and Celestron SCT’s for 20 or 30 years or more.