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 Post subject: finder scope
PostPosted: Sun Jan 04, 2015 3:22 pm 
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Joined: Fri Oct 10, 2014 8:12 am
Posts: 121
Location: earby lancs
Hi I keep getting dew on my finder scope so locating stars starts becoming harder as there ruled down I don't want to wipe it due to damaging the lens would it be good practice to put the dust caps back on the finder scope between locating objects

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 Post subject: Re: finder scope
PostPosted: Mon Jan 05, 2015 11:08 am 
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Joined: Mon Jan 09, 2006 11:05 am
Posts: 4758
Location: Lancashire
Outside of the summer months, dewing can be a problem. A basic requirement is to make sure that the dew shield is long enough. The manufacturers often make them too short.
I make mine protrude three times further than the diameter of the finder's objective. As you said, try capping the finder objective between use.
Before capping, it helps to insert a warm cotton cloth inside the shield to absorb the dew.

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