I am looking at two different scopes. One is an f/5 8" newtonian. The other is a 6" f/8 refractor (synta.) One of these will replace my 8" SCT f/10.
My question is this: In my 8" SCT, I can resolve globular clusters to the core. Will I be able to do this with the 6" achromat. I understand that resolving power is mainly a function of aperture, but I also understand that refractors have no central obstruction, and yield much higher contrast than other optical systems (also, they are just plain sharper.) Does the better optical system of the refractor make up for the smaller size in regards to resolution? In other words, will I be able to resolve most globulars into stars to the core?
I know this seems like a silly point to base the purchase of a scope on, but globulars have become my favorite deep sky objects to observe, since graduating to the 8" SCT.
Thanks in advance,