Vixen manufactures fine telescopes in several aperture sizes and configurations, to assure that you'll find one perfect for you.  Their VC200L 200mm f/9 Catadioptric Telescope is neither a Schmidt-Cassegrain or a Maksutov-Cassegrain, but rather a unique creation all its own: a catadioptric Vixen Sixth-Order Aspheric Cassegrain (VISAC) optical system, one of the most sophisticated optical designs available on the market today.  This design is free of coma and field curvature, as well as spherical and chromatic aberrations.  Especially noteworthy is its sharpness and flatness at the edges, which far exceeds that of Schmidt-Cassegrain systems of the same aperture.  It provides a pinpoint star image less than 15 microns, even at the edges of its 42mm image circle.  If you're looking for a photographic catadioptric, this is an excellent choice.

The Vixen VISAC optical system is composed of a concave primary mirror, a convex secondary mirror, and a three-element field corrector at the base of the focuser.  The primary mirror is a unique innovation:  A precise sixth-order shape produced by Vixen's High-Precision Poly-Order Aspherical Mirror Molding Technique.