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- Path: sparky!uunet!wupost!crcnis1.unl.edu!unlinfo!vporguen
- From: vporguen@unlinfo.unl.edu (victor porguen)
- Newsgroups: sci.astro
- Subject: Re: Cheap or Expensive Binoculars?
- Date: 26 Dec 1992 03:41:08 GMT
- Organization: University of Nebraska--Lincoln
- Lines: 19
- Distribution: world
- Message-ID: <1hgk8kINNl0s@crcnis1.unl.edu>
- References: <mc0ZVB1w165w@bluemoon.use.com> <BztqKy.7p2@cs.dal.ca>
- NNTP-Posting-Host: unlinfo.unl.edu
-
- Most of the better older binoculars had their prisms held in place
- by means of special spring-leeves, in turn held against the casing
- by screws. The newer, low-cost binoculars usually have their prisms
- glued in place with epoxy.
-
- Both types can be reset, but only the older ones were specifically
- made to be readjusted (recollimated) on special fixtures. The process
- took a few minutes. The objectives themselves were mounted on
- centerable mounts, allowing a further means of control. The newer
- types are usually preset.
-
- If you want a really good pair of binoculars, try to find an early
- Navy type made by Bausch & Lomb, for example. Those were beautiful
- instruments, nitrogen-filled to prevent moisture condensation and
- fungus growth, etc. etc. and had all the adjustments. A competent
- repairman could recollimate them to perfection.
-
- Finding a "competent repairman" is another matter, however... <g>.
-
-