Quote:
Originally Posted by LewisM
Deciding on a new Newt for imaging. Is f/4 going to make a dramatic difference over an f/5 system? I am well used to slower systems, being a refractor imager.
So the decision comes down to simply f/4 vs f/5 - both 8", both Chinese. The difference is in the cost  |
collimation tolerances are certainly easier to manage at f5. coma should be fully corrected with your CCDs with a MPCC or RCC also.