P3D Re: Older people with glasses...

Dr. T wrote:
> 
> I also have nothing against people who wear glasses.  I wear a pair of
> glasses in projection (:-) sounds like a joke but I mean in addition to the
> polarizing glasses).  But when I see a person who wears glasses, I hesitate
> to pass them my red button viewer.  The lenses of this viewer are just too
> small to work well with glasses.  It might take some "getting used to". 
> The stereoscope with its bigger lenses might be better.  Simple lenses
> (like in a Brumberger) might work better than short FL achromatic lenses
> (like in a Realist)
> 
> In the discussion of slides vs. prints, the viewer rarely comes up.  I tend
> to believe that certain people do not enjoy slides very much because they
> do not see a good image through the viewer.
> 

I have never looked at 35mm stereo slides with a viewer, so I hope
everyone will forgive me asking a stupid question.  Doesn't the Red
Button viewer allow for focussing?

As an amateur astronomer who enjoys taking his telescopes to public
star parties I know how important it is for each observer to focus for
their individual eyesight.  Although I've worn glasses since the fifth
grade, I never look through a telescope or binoculars with my glasses
on.  About the only reason for wearing glasses while looking through
an optical instrument is to correct for astigmatism in the user's eye.

My current cheap cardboard viewer that I use for my medium format
slides and prints doesn't allow for focusing, but the wooden viewer I
eventually build (probably from Alan Lewis' kit) certainly will.

-- 
Brian Reynolds -- reynolds@xxxxxxxxx -- NAR #54438
"Long ago, it was the way of my people to travel to the Moon. My people
travelled to the Moon in a ship called 'Apollo.' I tell the story of Apollo
in the hope that some day, my people will again travel to the Moon." P. Alway


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