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PrimaLuceLab Dew Heater for 250mm Diameter Telescopes
The PrimaLuceLab Dew Heater for 250mm Diameter Telescopes applies active, 12V heating to prevent dew formation on your primary optics during long imaging sessions. Its elastic design ensures a secure fit on optical tubes from 250mm to 300mm in diameter, drawing just 630mA of power to keep surfaces clear from condensation.
Flexible Heating for 250mm to 300mm OTAs
Engineered for 10-inch to 12-inch class telescopes, this dew heater features an elastic construction that accommodates a range of tube diameters from 250mm to 300mm. A strong Velcro closure ensures the heating element maintains uniform contact with the optical tube, which is critical for preventing dew on the corrector plates of Schmidt-Cassegrains or the objective lenses of large refractors.
630mA Power Draw with Native EAGLE Integration
Drawing a modest 630mA, this dew heater is built for efficiency within your imaging power budget. While it can be powered by any standard 12V DC source using its RCA connector, it integrates seamlessly with the PrimaLuceLab EAGLE computer, allowing for direct power and control from one of the EAGLE's regulated ports without extra adapters or controllers.
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Will this PrimaLuceLab Dew Heater fit my 11-inch (280mm) Celestron SCT?
Yes. The heater is designed with an elastic band to accommodate optical tubes ranging from 250mm to 300mm in diameter, making it a perfect fit for a 280mm OTA like a Celestron 11" Schmidt-Cassegrain.
I have an EAGLE computer. How do I connect this 250mm dew heater?
This heater is designed for native integration with the EAGLE. Simply plug its RCA connector directly into one of the EAGLE's available 12V power output ports. The EAGLE's software can then manage the power supplied to the heater.
What kind of power supply do I need for the PrimaLuceLab heater if I don't have an EAGLE?
You can use any 12V DC power supply that has an RCA-style output jack. Ensure your power tank or AC adapter can provide at least 630mA (0.63A) to run the heater effectively.
Can this PrimaLuceLab dew heater be used on a telescope smaller than 250mm?
This model is not recommended for tubes smaller than 250mm. The length and elastic tension are optimized for the 250mm to 300mm range, and using it on a smaller scope may result in a loose fit and inefficient heating.
How does the PrimaLuceLab Dew Heater attach to the telescope?
The heater wraps around your telescope's optical tube and secures firmly in place using an integrated Velcro strip. The elastic material of the band ensures it stays snug against the tube for even heat distribution.
Why is a dew heater essential for a Schmidt-Cassegrain (SCT)?
SCTs have a large, exposed front corrector plate that radiates heat into the night sky, causing it to cool below the dew point and fog over. This 250mm dew heater gently warms the corrector, keeping its temperature just above the dew point to ensure your view remains clear all night, which is a more active and reliable solution than a passive dew shield in humid conditions.
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| Telescope Diameter Fit |
250mm to 300mm |
| Power Requirement |
12V DC |
| Power Connector |
RCA |
| Power Consumption |
630mA |
| EAN Code |
8059020772963 |
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Dew Heater for 250mm Telescopes
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PrimaLuceLab 1-Year Warranty
