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(meteorobs) Re: [ASTRO] Dew prevention on lens with soap
In a message dated 98-11-06 16:32:08 EST, you write:
Rod<<
I'd say that rather than putting a film of soap on a lens a _much_ better
solution would simply be to buy (or build) a 'Kendrick style' heating element
for your lens which would apply gentle heat and would keep your lens free
from
dew as long as your battery lasts. <<
I have a system like that already and use it quite frequently. I'm just
looking for alternatives that may work.You never know if your kendrick style
heating element may fail on a crucial night? It helps to have alternatives. I
also use a hair dryer. Sometimes I go back packing to observe and I don't want
to carry the extra 8 pounds of weight in the form of a battery. I usually have
a lot of extra with me as it is.
Rod>>I wouldn't dream of doing piggyback shots
without a Kendrick heater wrapped around the lens these days. <<
You ever thought what you would do if your kendrick system failed on you just
as you started meteor observing? I have a pretty good idea what I will do in
such an event.
Rod>>No messy soap,
no chance of messing up a decent lens (sure don't want the yucky goop getting
inside the lens) and there's no doubt that with a dew zapper of this type
your
lens will stay dew free! <<
It's only messy if you come unprepared and are a clutz. I've already gone thru
two dew zappers...both at very in opportune times.
George Zay
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