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From my experience I’d say there is a bit of a visual difference between 180x and 210x, especially on nights of better seeing. For me it may even be my astigmatism makes it easier for me at higher mags. I know others with better eyes have had an easier job seeing details at lower mags that I need higher ones for.
Of course, that could also be simply more observing experience as that also plays a big role.
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