Maksutov–Cassegrain
Also called: Mak, Maksutov.
A compact catadioptric telescope with a thick curved front lens: sharp, slow (f/12–f/15), great for planets and the Moon.
Maksutovs are small, rugged and hold their collimation, making them excellent grab-and-go telescopes for the Moon, planets and double stars. Their slow focal ratio limits how wide a field they can show, so the largest deep-sky objects don't fit.