[Profiler (Profiler)]

Traditional wisdom also suggests that whether the refractor is a doublet v triplet is another important variable for contrast in VA hence why the new Tak is specifically a doublet Fluorite crystal primarily intended as a VA instrument.

Additionally, its design makes it very light, portable, easily mounted/balanced and has a super fast cool down period.

Better quality optics (glass) will allow greater magnifications without breakdown in comparison to lesser quality optics. This issue is not simply relevant to looking at bright objects such as planets but also important for viewing dim objects such as DSO's - The current issue of Oz S&T explains this point in nice simple terms as well.

There is something to be said for the old expression quality over quantity. I have personally seen plenty of examples where a much smaller aperture very high quality refractor beats the clappers out of a much larger aperture but lower quality scope.