ATM 24.5 inch binoculars or?(long)

["tdfullmoon" <tdfullmoon@koan.com>]

Greetings All
Opinions wanted:
I baught a 24.5 inch pyrex blank several years ago from a scientific surplus
dealer in Detroit which in its previous life had been an optical flat used
by a military contractor.In pristine condition, this would have cost a
fortune,but the glass was scratched and chipped in many places, some of the
chips extended more than 1/4 inch into the glass. There were even larger
chips around the edge circumference. I offered 100 dollars to the gentelman
and he accepted. My plan was to cut the glass into 2 24.5 disks,each having
one useable side (the one I cut). I felt this would take me a few weeks. 2
years later, and 3 homemade cutting machine designs later, the job was done.
The blank had been 5 inches thick but since the edge imperfections forced me
to make my cut off center, I now had 1 blank of 1.5 inch and one of 3. 25
thickness.I am nearing completion of the 1.5 inch optic which will be around
f 4.5. My question to the list is should I make the other blank a f 8 high
resolution scope (parachute included)as originally planned or, make it the
same 4.5 and turn it into a binocular? Any thoughts?
Many Thanks,
Dave
-----Original Message-----
From: Michael J. Coslo <mjc5@psu.edu>
To: atm@shore.net <atm@shore.net>
Cc: Darren <dcrfd@centuryinter.net>; ATM <atm@shore.net>
Date: Friday, April 16, 1999 6:17 AM
Subject: BB Gun Sites, was Re: ATM MAJOR DISCOVERY !!!


>
>At 6:57 AM -0400 04/16/1999, Bob Smallwood wrote:
>
>>Now, for something on-topic: WIth regard to BB gun sights:
>>
>>1) Don't you need a "rear sight" in order to locate the right spot in the
sky?
>>Otherwise, I see a half-degree or more shift in apparent aim just by
moving my
>>head.
>
> Are you looking at a subject at infinity? I noticed and was
>bothered by the shift until I realized I was looking at an object around
>ten feet away.
>
> - Mike -
>
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