Quote:
Originally Posted by jjjnettie
ahhh,
No Fan.
See, I had no probs with my 10" cause it had a fan.
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Jeanette,
I have a fan on my 12"LB. It stays on all night.
I have never lost an observing session "due to dew".on the primary.

Once the fan is switched off (especially on a very wet night) the mirror fogs up very quickly.
So........just a simple computer fan will be enough, and they consume very little power.