RE: binocs

From: Matson, Robert (
Date: Mon Jun 17 2002 - 17:33:53 EDT

Hi Jonathan,

> I can usually get to magnitude +6, +7 (sometimes  +8 with averted
> vision and squinting) with my binoculars, which are 7x35's.  Just
> out of curiosity, would I see at least a marginal increase if I
> were to switch to 8x56's (I am in my 20's, for pupil concerns) ?

Absolutely, regardless of your pupil size.  The 56mm diameter
objectives have 2.56 times the light gathering power of the 35's,
which buys you a full visual magnitude, all other factors being
equal.  If you have 7mm-diameter pupils (and well-corrected vision
when your eyes are fully dilated) then you'll benefit from the
larger binocular exit pupils of the 8x56's.


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