There are some amateurs getting great results with the Quark, just check out the solar chat forum.
Won’t give you full disk imaging capabilities but close detail excellent.
Needs an >f6 scopes as a minimum.
I disagree with Peter, in that good views and imaging can be achieved with more cost effective 60mm solar scopes. Sure, a 90mm Coronado or 100mm Lunt would be great....but at a hellava price!!
