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To each his own.
I have a 4" f/7 apo, and found the new 85° Masuyamas to have way too much uncorrected astigmatism in the outer field. Contrast is good.
Perhaps at f/15 (I used to own an f/15 refractor), they'd be better-corrected.
Modern scopes are typically shorter than f/8, though, so I'm not sure who these eyepieces were intended for.
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