I think if you divide the mag of the ep by the fov this gives a real fov thru the ep. so 5mm in 1000fl scope gives 200x, put 82 over 200 = .4 deg fov
7.5 in 1000 gives 133x, 52/133 = .39. So it appears the real view thru the ep's would give pretty much the same amount of sky to view
I don't think you'll go wrong with those magnifications
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