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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!caen!saimiri.primate.wisc.edu!copper!aspen.craycos.com!jrbd
- From: jrbd@craycos.com (James Davies)
- Newsgroups: sci.astro
- Subject: Re: Frosty the telescope
- Message-ID: <1993Jan26.002936.18268@craycos.com>
- Date: 26 Jan 93 00:29:36 GMT
- References: <1993Jan19.174752.2575@nsisrv.gsfc.nasa.gov> <1993Jan22.211557.11926@craycos.com> <24JAN199301451186@reg.triumf.ca>
- Organization: Cray Computer Corporation
- Lines: 18
-
- In article <24JAN199301451186@reg.triumf.ca> asnd@reg.triumf.ca (Donald Arseneau) writes:
- >In article <1993Jan22.211557.11926@craycos.com>, jrbd@craycos.com (James Davies) writes...
- >>I've found frosting of eyepieces to be a problem on cold nights also.
- >>You can un-fog an eyepiece by wrapping your hand around the barrel for
- >>a few minutes, although you have to take off your glove for this and
- >>will wind up with a cold hand instead :-). Also, breathing on a cold
- >>eyepiece is a real bad idea -- breath condenses really well on the
- >>lens surface, and takes forever to clear up.
- >
- >I find that eyepiexes fog up by looking through them! I think it is the
- >moisture coming from my eye. Often standing up straight for half a minute
- >lets it clear up; sometimes I lift out the eyepiece, hold the barrel in my
- >fist, and wave it around.
-
- Another trick is to place the eyepiece next to your mouth and gently
- inhale (drawing air across the lens). Be careful not to exhale, or
- you'll wind up with more fog. This isn't always easy if you're cold
- and bundled up, though.
-