If you point a telescope or any lens at the night sky, condensation usually forms on the lens within half an hour or so. This is caused by rapid cool down of the lens to below ambient temperature.
Kendricks Premier dew heaters are designed to disperse heat into your optics to stop dew formation. Many companies have tried to copy this original design and idea by Jim Kendrick, however the premier heater line remain the most reliable, highest quality dew heater on the market, and a must-have accessory for astronomy.
Simply wrap the heater around the front of your telescope, finder or eyepiece, just behind the optics. The heater has a high quality elasticated Velcro tab which holds the heater in place. Kendrick dew heaters can be used in combination with Kendrick dew shields for added contrast and protection against dust. Kendrick Premium heaters have an RCA plug which fits into a Kendrick dew controller and must always be used with a controller. Dew heaters should never be used by connecting them durectly to a power source.
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