🚀 go-pugleaf

In article <33608@scicom.AlphaCDC.COM> wats@scicom.AlphaCDC.COM (Bruce Watson) writes:

|   Path: ericom!sunic!uunet!olivea!spool.mu.edu!agate!boulder!csn!scicom!wats
|   From: wats@scicom.AlphaCDC.COM (Bruce Watson)
|   Newsgroups: sci.astro
|   Date: 21 Jan 93 17:55:36 GMT
|   References: <1jgr7eINN11f@usenet.INS.CWRU.Edu|
|   Organization: Alpha Science Computer Network, Denver, Co.
|   Lines: 14
|
|   In article <1jgr7eINN11f@usenet.INS.CWRU.Edu| clv2@po.CWRU.Edu (Clayton L. Van Doren) writes:
|   |
|   |my dealer.  I brought it in and gently warmed and dried it
|   |with a hair dryer, with the scope pointing up and the visual
|   |off (to let the cold air inside the scope out.  I warmed and
|   |dried all of the optics the same way.  Is this a safe method?
|   |Does anyone have any other suggestions?  
|   |
|   I would have brought the telescope inside and let it warm to a temp
|   above freezing slowly -- the same with dew.
|
|
|
|   -- 
|   Bruce Watson (wats@scicom) Bulletin 629-49 Item 6700 Extract 75,131
|

The reason to that dew forms is that the abient air is cooled by your
telescope, which radiates its heat into space, to a temperature which
is below the dewpoint..

If dew hasn't formed yet, it probably will when you bring your scope
indoors. That is because the indoor air has a higher humidity and
can't keep it's moist when it is cooled by scope/bino/eyepiece or
whatever you have.

A way to avoid that dew forms on your equipment is to keep it in dry
air. That means, if you put your stuff in a plastic bag _BEFORE_ you
bring it indoors you will have dry air inside the bag. The dew will
instead form on the _OUTSIDE_ of the plastic bag. This procedure is
however only possible if dew or frost hasn't formed while outdoors.

Clear Skies

Peter




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