Heater strap for 3" scopes


Availability: In stock

This 1.75" x 13" dew heater strip fits telescopes having an outer barrel diameter of 3.5" to 5" (90mm to 130mm) . . .
Our Product #: DH3AZ
Astrozap Product #: AZ-703
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Product Description

This 1.75" x 13" AstroStrap dew heater strip fits refractors and catadioptric telescopes having an outer barrel diameter of 3.5" to 5" (90mm to 130mm). One side of the heater strip is sponge-insulated. This directs the warmth of the heater element into the optics, rather than being lost into the atmosphere. The result is that you need less energy to keep your optics moisture free.

The heater strip is wrapped around the eyepiece or finderscope, shiny blue cloth side in. The back of the heater strip is black Velcro. There is a Velcro tab on an elastic strap on one end of the heater strip. When you pull the strap tight and press the tab onto the Velcro back of the heater, the elasticity of the strap holds the heater in place on the eyepiece.

The heater strip is more efficient than most other brands and draws only 0.5 amps at full power (although power consumption at normal operating levels will generally be considerably less). It has a permanently attached 6' power cord terminated by a male RCA plug for connection to the heater control unit.

Tech Details

Warranty 1 year


Review by:
I'm using this on my just over 3" Nikon 180 2.8 AI-S, and it has kept dew and frost off my lens even in the worst conditions. I've taken it through some very humid conditions that ended up freezing as the night went on, and it kept the lens several degrees above ambient and allowed me to image until the freezing fog rolled in. Not as pretty as some of the higher end solution, but works great! (Posted on 1/10/2019)
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