Newtonian secondary dew shield

[Fraunhoffer]

My secondary dewed up so thought Id try and insulate it.
If this doesn't work I'll add a resistor matrix over the top.
 

Basically its a layer of old diving sock neoprene cut to lay over the top of the secondary and the support has a piece of shaped 22mm plumbing insulation wrapped around it with some neoprene tape to hold it all in place. I cut the pieces based upon a paper template and took care not to add any pressure to the back of the glass or obstruct the light path. The neoprene is just resting on top - no adhesive.

Clear skies.
 

[Knighty2112]

Be interested to see if it works for you. 👍🏻