Hi guys, quick question for you lot who have big dobs with open mirrors. Do you find fans good enough to keep the glass at ambient or is it necessary to apply a little heat?
I have a small 5" newt. I do get dew on the primary after a whole night imaging especialy if I'm pointing up. It's not
major but I'd like to keep the optics as dry as possible. So I peeled the backing of the primary to expose the glass and velcroed a small 100mm 12V fan.
Probably testing tonight. What are your thoughts? Waste of time or one step in the right direction?
Thanks for any tips.
