Re: [Paddlewise] Tasco Binoculars

From: Michael Daly <michaeldaly_at_rogers.com>
Date: Tue, 21 Jan 2003 15:05:32 -0500
From: "William Lloyd" <lloyd_at_execpc.com>

> From: "Michael Daly" <michaeldaly_at_rogers.com>
> > From: "Steve Holtzman" <sh_at_actglobal.net>
> >
> > > The eye relief is 17 mm but I found it
> > > is more comfortable to not roll the eye cups down and just sort of push my
> > > glasses up slightly.
> > >
> > I've noticed that there is considerable variation in the degree to which
> > binocs are able to "overfocus".  That is, the infinity point for someone
> > with normal or corrected vision is not the end of travel for the focus
> > control.  They often focus past that point.  That means that those of us
> > that are nearsighted can sometimes focus past the normal infinity point
> > and use them without glasses!
> 
> I hope I am not misunderstanding the post below but just as a precaution let
> me say that "eye relief" has NOTHING to do with how much correction there is
> ["diopters"] or how "far" the binoculars will focus, etc.

No problem.  My post was just to point out that there is an alternative
to getting long eye relief and that is to find binocs that do not require
the use of glasses (though I guess it's not that explicitly stated.)

One problem with long eye relief is that the binoculars (or anything with
an eyepiece) can be less easy to use without glasses.  The glasses
help hold the eyepiece at the correct distance.  I've used telescope
eyepieces where the exit pupil is hard to find and keep in your field of
view without glasses due to the amount of eye relief.  One manufacturer
of telescope eyepieces sold two versions of the same eyepiece, one
with and one without high eye relief so both eyeglass wearers and others
could have the optimal version.  

In general, this is less of a problem with binocs, however, it you are
getting binocs for yourself and your spouse and only one wears glasses,
you may want to look into this.  I have an old pair of high eye relief 
binocs that are annoying to use without glasses.  These binocs have very 
deep eye cups that are used without glasses and can be rolled down for 
use with.  They are so annoying that I regret ever buying them.

Mike
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Received on Tue Jan 21 2003 - 12:04:53 PST

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