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Orion Dew Zapper for 8" Schmidt-Cassegrain
Binding: Electronics
Brand: Orion
EAN: 0410000061558
Feature(s): Electronic dew elimination system keeps dew from forming on the corrector lensRuns on 12-volt DC powerPlugs into a car cigarette light or a field battery (sold separately)Fits all Meade and Celestron 8" Schmidt-Cassegrains
Label: ORION
List Price: $42.95
Manufacturer: ORION
MPN: 03503
Product Group: Photography
Publisher: ORION
Studio: ORION
UPC: 410000061558
Editorial Reviews
Product Description:
With Dew Zapper, you'll never have to stop observing to remove condensation from the front plate of your Schmidt-Cassegrain or Maksutov-Cassegrain. An unprotected corrector lens will radiate heat, quickly cooling to below ambient air temperature, allowing dew to form. Dew Zapper gently replaces lost heat, bringing the temperature of the corrector lens back above the dew point. Dew can't form, and you never get "heat wave" disturbances like those caused by warm-air blowers and heated dew caps. The flexible, fiberglass-reinforced heating element straps securely in place with a Velcro fastener. Runs on 12-volt DC power. Plugs into a car cigarette-lighter receptacle or a "field battery," delivering up to 20 watts, 2 amps. All models include a 10' cable.
Customer Reviews Average rating - 4.0
Rating - 5 Date: 2007-12-31
Content: I've used this device three times, most recently for two hours on a cold and humid night. I have not had a trace of condensation on my telescope's optics. My OTA was wet, and my red dot finder was cloudy, but views through my OTA were pristine.
Summary: Does What It Says
Rating - 3 Date: 2004-09-08
Content: If you observe the night sky using a telescope in a humid environment, then you have probably had an observing session cut short by dew forming on your lens. The Dew Zapper delays/prevents the onset of dew/frost (depending upon conditions) to prolong your observing sessions. The one drawback of this model is that you cannot adjust the heat output of the device, since too much heating can cause tube currents (of air) that tend to affect your viewing. Using a dew heater along with a dew shield (lens shade) will prolong your observing sessions in humid environments.
Summary: Observe longer with the Dew Zapper
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