How do you deal with dew formation?

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How do you deal with dew formation?

Postby scullyp » Sat Dec 10, 2005 2:36 pm

I am new to astronomy and find that my view quickly turns hazy, which i think is dew formation. Where do you store the scope, room temp or outside temp, and are dew removers effective? I would appreciate any advise.
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RE: How do you deal with dew formation?

Postby sonia » Sat Dec 10, 2005 2:53 pm

You can buy Easy-fit Flexible Dew Shields. Depending on What telescope you have.

I always keepy my telescope inside, until its suitable outside to use it.
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RE: How do you deal with dew formation?

Postby scullyp » Sat Dec 10, 2005 3:26 pm

Thanks Sonia
I have a 140mm reflector, would a dew shield be helpful on that?
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RE: How do you deal with dew formation?

Postby sonia » Sat Dec 10, 2005 4:16 pm

What make is the telescope?
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RE: How do you deal with dew formation?

Postby piglet » Sat Dec 10, 2005 4:50 pm

A handy tip is too use if you can an hair drying to remove Dew not the best solution but it does work. A dew sheild is best this can be made from cardbaord or plastic(stiff).

James
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RE: How do you deal with dew formation?

Postby sonia » Sat Dec 10, 2005 6:30 pm

You can buy one around £10-£30.
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RE: How do you deal with dew formation?

Postby andyrawlins » Sat Dec 10, 2005 9:16 pm

You can also buy or make dew heaters which are the most effective way of removing and avoiding dew.
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RE: How do you deal with dew formation?

Postby keithmorris » Sun Dec 11, 2005 1:06 pm

I made my own dew shield. Just go to Millets or any other camping shop and buy a Karry mat. It is a mat you put down on the ground under your sleeping bag. It is approx 5mm thick foam. Then use self adhesive velcro and wrap it around your scope. Voila! An insulated dew shield for less than £6.00! Mine works great with my Meade LXD75 10" SNT.
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RE: How do you deal with dew formation?

Postby sky_at_night » Tue Dec 13, 2005 9:16 am

I normally go in doors !!

I seem to get hit a couple of times a year with dew. But I cant justify the price of a dew heater as yet. I do like the look of that Kendrick 10.

Kevin.
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RE: How do you deal with dew formation?

Postby Pete Lawrence » Sat Dec 17, 2005 9:06 am

A hairdryer will remove the moisture but be careful. The best option is to purchase (for about £15) a 12V hairdryer (the type that are sold as defrosting devices for campers) and couple it up to a car battery or other 12V source. It's not safe to use a mains hairdryer in the wet for obvious reasons. In addition, main hairdryers can output extremely hot air which can cause damage. Although rare, it's not unknown for mains hairdryers to crack SCT corrector plates!

After using a 12V hairdryer to remove moisture, it's best to leave the telescope for a short period so that it can cool down again. If you don't your view is likely to be a bit unsteady for a while.
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