Rain heating for the Telrad seeker | Astrozap

A clouded lens means that you can barely see the red rings and the stars behind it, and then it’s difficult to find your objects. This Astrozap lens fogging heater keeps the slanted glass window just warm enough to counteract fogging.

The heating has been made for the Telrad finder with base, which projects the red rings onto a slanted glass window. A dew cap for the viewing window the cooling is already slowing down, and the heating does the rest on really humid nights.

Take your viewfinder into account when tackling fog, alongside the telescope itself. Beforehand, consider how to provide power for the heating system so that it fits into the rest of your setup. More about tires, covers, and controls can be found here. Dew prevention for your telescope.