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Does aperture rule in bino land?

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depends on what your targets are. ....

edz

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Isn't it also the case that "NELM" ("naked-eye limiting magnitude") enters into this to a significant extent? In higher local light pollution, magnification increases in importance relative to aperture, while the more dark the sky, the more gain there is from increasing aperture relative to magnification.

Then also in the relation between aperture and magnification, there's always some need to consider exit pupil size, isn't there?

Ed Cannon - Austin, Texas, USA

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