Quote:
Originally Posted by Camelopardalis
The C9.25 being anything special is anecdotal. Celestron's shift in manufacturing from the USA to China is much more significant. Since that happened, there are a lot of reports of their SCTs in all sizes with good optics. Damian Peach once used a C9.25 but now uses a C14.
Regardless of what scope you use, what's most important is good collimation, good focus and good seeing  |
Damian Peach has the luxury of a permanent setup (lucky him!).
The C9.25 despite having a larger central obstruction, has been noted many times as having good optics relative to the other scopes in the range. And while many reasons have been flouted for this, the usual one is the "gentler" focal ratio of the primary mirror.
As to it's status as special - no, it's not. It will not do wonders Vs the others in the range, but it is relatively much more portable than a C11. Of course, usual rules about aperture mattering do apply, subject to proper cooling along with the other parameters you mention