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04 Грудня 2024, 18:36:58

1 година 1 день 1 тиждень 1 місяць Назавжди

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[Steve1976]

Hello again folks!

About making a dew shield, what is the best way?

Spring will come soon with clearer skies!

[Mott]

Dear Steve

The matter actually is not so sophisticated/complicated deal.

e.g. flexible and not too flexible dew Shields:

http://www.atozastro.com/shop/scripts/prodList.asp?idCategory=25

http://www.cloudynights.com/item.php?item_id=353

http://www.celestronimages.com/details.php?image_id=2722

[icetechno]

http://www.celestronimages.com/details.php?image_id=2722

интерестно, зачем на этот Ньютон противоросник? 

для защиты диагонального зеркала
for secondary mirror protection

[Steve1976]

Would a sturdy plastic folder (папка) be ok to use?

[LifeIsGood]

Almost anything will do the trick. Yet plastic folder will probably be hard to bend into a circle. I prefer something soft, foamy. Like yoga mat or similar.

[Steve1976]

Fab! Got something similar! Thanks

[Steve1976]

Sorry, one last question!

Will the dew shield be enough to prevent dew forming or will I need to get some dew heater straps at some point? In the UK some people say they don't need them. But if I do need them how much should I expect to spend on them together with an external power source?

Ta 

[Roman K.]

Will the dew shield be enough to prevent dew forming or will I need to get some dew heater straps at some point? In the UK some people say they don't need them. But if I do need them how much should I expect to spend on them together with an external power source?

Steve, I have much more experience with reflectors then with Maks, but imho you won't need so much of protection, at least if you don't have your observing site close to a river or lake. I suppose that any kind of dew shield will suite your needs. Anyway you can try to make a few observing sessions in different conditions (dry/wet, evening/morning, cold/warm), so after that you will be sure about the amounts of dew.