Custom solutions are available upon request. Ritchey-Chrétien telescopes, part of the Cassegrain system, feature hyperbolic mirrors that minimize optical errors like spherical aberration and ...

With my old Celestron 8 Schmidt-Cassegrain telescope, I used to ‘tap the tube,' and I'm sure that still applies, but with my 20-inch Obsession reflector, the first thing I tell folks is, ‘Grab ...

For centuries, telescopes have relied on curved lenses and mirrors to capture images of the cosmos. ... However, FZPs suffer from chromatic aberration, which results in color distortions.