I have a skywatcher explorer 150pds and 2 nights in a row I had dew covered my secondary mirror and the data was ruined.
are there any good dew heater for this?
I have found these:
I don't want to make one myself because om not that good with these kind of things.
I have read that the glue can melt and the mirror can drop on the primary.
Dew shield is another option, I made one myself but if it's windy outside it acts like a sail... But how effective are they really?
Edited by Calzunen, 25 September 2020 - 02:27 AM.