SVBONY SV192 Dew Heater Strip 560 mm Lens Heater Warmer for Telescope DSLR Camera Lens Outer Diameter Below 178mm

This dew heater works perfectly with the ASIAir, keeping my telescope’s glass elements nice and warm—completely free of dew. I also really appreciate the elastic band combined with the Velcro, which ensures a snug, secure fit on my scope. Feels sturdy and reliable.

Warms up fast and keeps whatever wrapped warm. Will be using this in winter season for sure. PS can also keep your drinks warm.

They work. Able to control voltage % in AsiAir

Works great on my Apertura 6" RC Reflector. Keeps the Florida dew off the mirror.

I use it on my 130mm EDT refractor, which it fits perfectly. I have a smaller version on my guide scope as well. I like having 3 different heat settings with the built-in controller. I have a lot of SVBony astronomy accessories and scopes and all are of high quality.

Works exactly as needed, no problems at all. Worth the money. I use it in conjunction with a dew shield and don't have any problems running it on medium.

Does a good job of keeping dew off the lense. My only complaint is that it does not come with its own power connector.

Works well when wrapped around the end of my Celestron Nexstar 8SE telescope. It's a bit shorter (circumference of heater = 56cm vs 64cm for the 8SE) but it works fine as heat slowly diffuses over the front ring and through thick corrector plate. It might not work in Siberia, but it works just fine around here (SoCal). Has three heat settings, on high it pulls 1.8A max so a simple 2A power supply is plenty. I use the Kiss TMEZON 12 Volt 2A Power Adapter Supply AC 110V (here on Amazon) so nothing will go dead on a chilly night. It also works fine from the Celestron power tank, which also has a 12V outlet.