Schiefspiegler anyone?Posted By William Chang |
Maybe not a Schief, but a Classical Cass or Mersenne secondary? (Respectively hyperboloidal and paraboloidal, grind your own.)
If the primary were f7 or so, you could "fold twice" with an X% CO round secondary and same X% CO elliptical tertiary, for low eyepiece height. But that's not what you have.
-- William
If the primary were f7 or so, you could "fold twice" with an X% CO round secondary and same X% CO elliptical tertiary, for low eyepiece height. But that's not what you have.
-- William