I haven't had an opportunity to star test this particular C5, but the optics look pristine and terrestrial viewing looks great! I have another C5 that has very good optics despite also having a tiny crack in its corrector plate. I'll post a follow-up once I have a chance to test this scope out under the stars.
Mechanically, all three of my orange-tube Celestrons (and a Meade 2080 LX3) are in wonderful shape. (The C8 was in very rough shape when I got it, but it cleaned up nicely. Both C5s were well cared for.) The drives work (the C8 was stubborn, but eventually spun up), motions are silky smooth, clutches are fine, bearings are tight, focus is also silky smooth with almost no image shift in any of these scopes.
These make excellent general purpose visual scopes and are very well suited for star-hopping once the Finder has been updated with something a little more comfortable to use.
I've got the C5 outside right now getting ready to observe the lunar eclipse. It is partly cloudy, but I've got some nice patches of clear to work with. The collimation is off just a teeny bit, but the optics look great! The stars in the sweet spot show nice circular diffraction rings and the inside/outside focus images look good. What a wonderful little scope!
Edited by jgraham, 27 September 2015 - 07:34 PM.