[Wavytone]

Hi Paul, nice, typical “Celestron” images. A C11 Edge HD will give you a bigger image scale and brighter images sure, but resolution will be much the same.

A scope with supreme optical quality will give better, clearer detail than a slightly larger scope with mediocre optics. And most Celestron and Meade SCTs are... well... ordinary.

To get sharper images you’ll have to switch from SCTs with a fat Central obstruction to something else, either for example a 9” Schiefspiegler at f/23 will do far better or a high-end maksutov - TEC or AP at F/15 or f/20 with small secondary.

Another option is a big old-school newtonian planet killer with an f/9 primary and a Barlow or eyepiece projection, but mounting this will be a huge problem.

This is the point of strehl as a measure of quality ... Celestron and Meade SCTs typically are 0.8...0.9 but none top 0.9. My mak is 0.965 - and has a small secondary obstruction.

If you have the $$$$ the last of the Russian optics sets if for sale at APM - a 14”Mak by Matthias Wirth with Intes glass.

FWIW I see you are in Sydney, if you would like go side by side with my scope to see what is really possible from a 9” I’m up for it tonight. Mine is on an AZEQ6 if you’re tempted to put your camera on but my focusser is rubbish.