Astrozap Dew Heater Tapes
Astrozap Dew Heater TapesAstrozap Dew Heater TapesAstrozap Dew Heater Tapes

Astrozap Dew Heater Tapes

  (4 Reviews)
✓ 2 year warranty


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About this product

Model:  AZdewheater-2
Part Number:  AZ-702

New improved design

An AstroZap flexible dew heater stops dew forming.

Simply wrap one around the telescope tube near the optics and secure it there with its integrated Velcro/elastic strap. A gentle heat is then transferred to the optics until the temperature is slightly warmer than the dew point. 


  • Modern heating element provides even heat distribution and low power consumption.
  • Power cord on the same side as the velcro fastener reduces wear on the cable and prevents snagging.
  • Smooth inner fabric protects the telescope's finish (doesn't scratch or mar the surface).
  • Outer neoprene thermal insulating layer prevents heat loss.
  • Durable all-sewn (not glued) construction.
  • Available in a wide range of sizes. 
  • Adjustable Velcro/elastic attachment ensures a snug fit.
  • Supplied with a six-foot flexible cord terminating in a phono-plug with moulded strain-relief for 12-volt operation.

Will I need a Dew Controller? 

When using a single heater-tape on a telescope with an aperture around 10" or larger a simple 12V Dew Heater Supply Cable can be used to connect the tape to a suitable 12V power-supply. When connected this way the tape is essentially running on full-power. This won't harm the tape but with smaller telescope apertures it might result in the optic being warmer than necessary which can effect the view and waste energy. The solution then is to use a Dew Controller which regulates the heat (also enables you to use more than one heater tape). Astrozap Dew heater tapes are compatible with most good dew controllers, including those manufactured by Lynx Astro. 

Two year no fault replacement warranty. 

Customer reviews

Average Rating (4 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
3 version for SkyWatcher 72ED Refractor
Wednesday, 5 August 2020  | 

Fits perfectly and kept the telescope dew-free all night in combination with the HitecAstro four-channel, four-port Dew Controller

Rating (max 5):  
Quality dew straps
Sunday, 19 January 2020  | 

I bought the 4" one when I got my new scope and realised how good it was compared to my diy ones, so I decided to get 2 more to replace the ones I'd made for my finder and guide scopes. They heat up quickly, are very flexible and easy to install.

Rating (max 5):  
4" version for ED80
Saturday, 7 December 2019  | 

Got the 4" version for an ED80 Pro and it's a little bigger than the OTA but nothing excessive. Like many items in this hobby, some become essential - this was one of them for imaging. No more dew.

Rating (max 5):  
Astro zap dew heater
Saturday, 19 January 2019  | 

Very good heats up well speedy delivery customer service second to none Flo are the best good advice good knowledge excellent


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