[ATM] Dew shield.

[marco.pm at btopenworld.com (Marco Miglionico)]

Hello all fellow astronomolisationismalists (and scope makers).

I have a few questions about dew shields as I cannot find info on them.

1/ How does a dew sheild work?

2/ What is the best material to make it from?

3/ Is is only useful for scopes with large amounts of glass at the top
end or can a newtonian benefit from one?

4/ Is it also supposed to help prevent heat from the observer crossing the
optical path?

5/ Does it do the same job as heat rope?

Any answers much appreciated.

Thanks,

Marco Miglionico,

Scotland, Edinburgh.

Cloudy, wet, rainy, low pressure, jet stream right above my head 256 days a
year,
more neon, argon, sodium and xenon light pollution than the whole of a
galaxy whose inhabitants love artificial light put together, and if I get
good seeing it means that polaris only looks like a jellyfish as opposed to
an octopus on bad nights. The Enkle gap is just a myth.

www.geocities.com/telescopiman