|
Yep like everything in the Universe there is no free lunch. The trick is to get a compromise with the things that generate the optical faults and make sure no one parameter dominates. If there was a simple perfect scope we would all have them!
Only one thing will overcome this and that is the inherently exponential escalating cost of manufacture to attain near optical perfection.
Every design has its strengths and weaknesses. The thing is to get something that works best for your imaging interest. If something is not generally used then there could be practical reasons.
I can see your problem. How do you better a reasonably fast well corrected refractor? A TMB no less.
Not easy!
Bert
|