Ok,
I've asked a few questions about refractors for imaging and become paralysed by choice (primarily because I'm retired and can't afford to make a mistake - wasted too much money on crap that doesn't work properly)
I'd like an FSQ106, but it would have to be secondhand and they don't come up often.
As an alternative I found a web page here:
http://photonenfangen.de/instruments...esprit-100-ed/
where the guy is using an Esprit 100 at f5.5, and also adding a small Riccardi reducer to image at F4.1.
The images look pretty good - anyone have opinions on whether this might be a good lower priced alternative to an FSQ?
CCD's:
KAF8300
ASI071MC PRO
cheers
Gary