Dew strap for field flattener?

[AstroExploring]

Does anybody use a dew strap for their field flatteners? I haven't suffered from dew yet but only been able to image for 2 hours max before cloud stops play so far. I do have a spare port on my controller but I was saving that for the guide scope when I invest in one.

Cheers

Nick

[david_taurus83]

I've not seen or heard of anyone suffering dew on the flattener? It's usually the exposed optics like the front objective that need good dew protection. A coma correcter in a Newtonian may be susceptible to dew?

The guidescope as you point out is a must though!

[Davey-T]

I get condensation inside the WO flattener when it's permanently setup under a scope cover and have to blast it with a hair dryer, not sure if a dew heater would prevent it unless left on 24/7.

Dave

Edited January 4, 2020 by Davey-T

[AstroExploring]

Thanks both. I shall continue to not use one and hope that I don't get any issues!