This is from a new member here so howdy all!!
I've been an observer for forty years and had two scopes a 60mm play scope and a black c8.
One had contrast one had light gathering power.
Guess which ones?😉 sure sure the c8 had super optics but could never show me so powerfully like that super little scope, the supposedly so difficult Horsehead nebula.
In a good refractor the Head is ridiculously easy even in LP skies in fact when I looked through a Televue 70mm in S.E. Vancouver the whole region Runningman etc.etc. was so bright I thought it was clouds real clouds! AMAZING!!
Why I love refractors could have been my thread instead and Contrast efficiency is my mantra, that is why I bought a SW-100ed pro and a decent mount, to get back into the wonders above. I think we have sime jargon-strehl ratio being the most important I believe. So when does it become hard to see and can only a lense get PERFECT images?