Home :: OPTICAL ACCESSORIES :: Other Accessories :: Desiccants and Optics Heaters :: Dew Shield - Lens Shade with Dew Heater for Celestron 11" Schmidt-Cassegrain Telescopes with Digital Controller

Dew Shield - Lens Shade with Dew Heater for Celestron 11" Schmidt-Cassegrain Telescopes with Digital Controller

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in In stock (5)
Model
VSH36508-C11-DIGITAL
Weight
1.90 kg
RRP:
£99.00
Our price:
£94.00
5%

including VAT 20.00 % ( £15.67 )
Qty

NEW VERSION - NOW WITH DIGITAL CONTROLLER

For best performance of your telescope, this accessory provides a solution with maximum prevention and reduction of dew. As a lens shade it reduces or very possibly completely eliminates stray light as it has a non-reflective black velour interior cover.  As a dew shield, it reduces dew by its shape, however if dew still appeares due to extreme moisture content in the air, switch it on and the built-in dew heater (heating strip) will remove any dew from the corrector plate.

Unlike most heating strips, this device can be directly powered from your power tank if you have a spare power cable with center positive, 2.1mm/5.5mm plug.

Made for operation at 12 Volts.
A suitable 12 Volt DC power supply is required, either via mains transformer or power tank or other suitable battery, but please don't forget that you'd also need a compatible supply connector cable with a center positive, 2.1mm/5.5mm plug.
 

NEW! A single channel controllel is now included.

SPECIFICATIONS

  • Compatibility*: Celestron 11" Schmidt-Cassegrain telescopes (Celestron Advanced VX 11, CGEM 11, CPC1100 etc), but most likely other similarly sized telescopes as well. Please check out the actual circumference of your telescope to see if this is the correct size for your scope!
  • Nominal Heated Size: 94-98cm active heating length
  • Actual size: appr. 105-108cm overall length including appr. 11cm flexible end with Velcro that makes it possible to cover a circumference from 94 to 102cm
  • Power: power level adjustable via the built-in digital controller
  • Connector cable length: appr. 80cm before the controller and appr. 20cm after the controller, plus a 2m long extension cable included as well
  • in this new version the digital thermometer function is included in the digital controller

*Please check out the actual circumference of your telescope or eyepiece before you purchase this dew shield with heating strip.

Images are for demonstration only. Some images might show the previous version.

HOW TO USE IT

Please see below the visual instructions that we received from the manufacturer, however if this is not exactly easy to grasp, please scroll further down and we also created a simple step-by-step user manual...

(Our guess is that this controller is being used for a variety of instruments, not just this dew heater hence the 8 different functions...We suggest to simply ignore those...)
 
1. Fit the dew shield to your telescope in the normal way ensuring that the heating strip inside the dew shield is as close to the corrector plate as possible.
2. Power the dew shield using a 12 Volt power supply. The 12 Volt supply lead with 2.5mm plug at one end, and a cigarette lighter adapter at the other end, of the type used to power telescope mounts, cooled cameras and the like should be fine and plugs directly into the cable on the dew shield. (5.5mm / 2.1mm jack connector)
3. Once powered the display lights up.
4. Press the SET button to set the temperature, the display should be flashing, you can use the UP and DOWN arrows on the right to adjust to the desired temperature, when you are happy with that press the ENT button.
5. The temperature display will now go beyond that set to start with and gradually come back to what has been set.
6. To change the set temperature at any time simply press SET and  adjust UP or DOWN and ENT.

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