Protagonist wrote:

Uses mirrors, so no color if that's what you asking, APO-like.
It has a large central obstruction, (over 35%) like any other compound
telescopes, so star images will be bloated, from diffraction rings.
RC scopes advantages over standard SCT is flat field, no mirror flop,
because the stationary primary.
JS

Hi:

Well...I believe he's asking about the R not the RCX...two different
animals ;-).

This scope is nearly identical to the LX200GPS. Same focal ratio, same
secondary diameter, same OTA, same mount. It's not an RC, either, maybe
"optimized SCT" would be a better label. Finally, it focuses by moving
the primary mirror, just like the LX200GPS that it is (apparently)
replacing.

Optical quality? I have not used one yet, but I will GUESS that
edge-of-field performance will be superior to that of the "standard"
SCT. ;-)

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
and _The Urban Astronomer's Guide_

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