I had my 4" refractor set up and tracking at an event recently. All who looked through had positive comments to share. Most other scopes present were 8-12" dobs.
The accessibility of the view is as important as the size of the scope. For a beginner who's likely going to be viewing a showpiece object, a simple viewing experience is key.
I would argue that everything around the scope (mount, eyepiece etc.) is as important as the scope itself for outreach.
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