Celestron – Dew Heater Ring – Aluminum Dew Prevention – Compatible 8” Schmidt-Cassegrain, EdgeHD, RASA Telescope

Very even heating, easy to install, neat clean installation. I don't use it with the Celestron controller. I have an ASI AIR Plus which not only can supply dew heaters with power, it allows me to vary the percentage of power to each individual dew heater. It is nice that I didn't have to get the pricey Celestron controller in package so saved a lot of money. The design is also very efficient and doesn't use a lot of power to run compared to old style dew straps.

I bought this and installed it. The installation requires removing the existing retaining ring for the corrector plate--which has to be done with the OTA angled up. However, a paper shield comes with it to cover the glass during the "surgery." It really just involves removing about 8 small screws around the edge of the Schmidt corrector, removing the plastic ring (with the Celestron name and OTA size printed on it), aligning the dew heater ring in its place, and then using a criss-cross pattern to tighten the screws evenly (just like putting the lug-nuts on a car wheel). That's it! Takes maybe 10 or 15 minutes with a phillips head screw-driver (smaller than standard size). No technical expertise needed. Then discard the original ring or keep it for sentimental reasons. I power it with one of these: ALITOVE DC 12V 5A Power Supply Adapter Converter Transformer AC 100-240V Input with 5.5x2.5mm DC Output Jack for 5050 3528 LED Strip Module Light that I also ordered on Amazon. I was worried about the amperage and also the connector. However the unit above has way more amps than the dew heater draws and the connector is completely compatible with the dew heater ring as well as all of my other astrophotography gear--so, I have several of these inexpensive power supplies (on black Friday sale right now, 2023-11-21) for just over $10) for mount, camera, and dew heater ring.

I have a very nice telescope. The problem is the condensation on the lens (all). I use it in central Florida at our retreat out in the country. The moisture is terrible for scopes at wee hours of the morning and I have not been able to use this wonderful scope ( all computerized) for over a year because of the parts I wanted were made in Russia by a small business i learned about on telescope Web sites, but the Russian war made it impossible to buy it until they moved part of their business to USA just for Americans. I saw this and could not wait to get it for my scope. Works like a Florida dream. Highly recommend if you watch the stars late at night for hours. Just have a good battery (deep cell) to keep your tele warm.

This dew heater ring works very well. It went on easily and fits my Edge 800 perfectly. Shortly after putting it on, I noticed my stars had strange refraction spikes on opposite sides. After doing some research, I tried turning down the power to about 30% and the spikes went away. So just be aware that this ring gets very hot at 100% power - so hot, you cannot touch it. That heat does some strange things to the corrector plate and can make your stars look funny. I am happy with how well it works now, but clearly, the design is lacking and was not well thought out or tested.

I was very apprehensive about the installation but the instructions were well written with great pictures and the installation was very simple. The dew heater has kept my lens dew free.

I actually read the instructions before the package arrived, even though it seemed unmanly to do that. Installation was a snap. I bought it to replace the DIY heater made with Nichrome wire from a toaster and a cheap PCM controller from Amazon. It worked, but it lacked class. The Celestron heater works and has class.Dew is a nearly constant problem between the coastal marine layer and the radiation fogs from the Valley. I have heaters on all my scopes and "on" is the default position. Only one night's use so far, but it does look as if the Celestron heater ring is up to the job. The inline controller is smaller than the variable controller I was using, which makes cable routing much easier and neater.

i’ve been using large dew heater shields on my astronomy work for some time, but I am so happy that I found that Celestron made this model because I was really tired of handling the bigger dew heater shield. Perfect!

Me funciona perfectamente, ya puedo liberar a mi SC de la molestosa capa del rocío.

Needed this to combat dew on my Celestron telescope. Easy to install with just a screwdriver and supplied instructions. Works great to combat dew but had to get a controller to maintain the power source.

Works exactly as advertised, easy to install.

Not the best product around the quality is not very good

Purchased this for my celestron 6se telescope easy to fit if find difficult step by step how to fit on youtube.

Fonctionne parfaitement, installation très facile