Celestron 8” Schmidt, EdgeHD, RASA Aluminum Dew Heater Ring

I use the 8 inch ring on my Celestron 8SE SCT. I power it with the Celestron Controller 4X and it works perfectly. A must have if you live in a humid area.

Top quality and does what it's supposed to do. Works well with the Thousand Oak dew heater controller. Easy to install.

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.

It was easy to install and I love the idea of the ring rather than dew straps. The dust cover fits with the new dew ring installed. However, you have to install & remove the clip every time in order to put the cover on. The price was fair for a ring this size (I have the 8"). My only other concern is the sensor is not universal, would've been 5 stars otherwise. Celestrton says it works with their controller which is, IMO, very expensive. You can use it without their controller at full power but that will use a lot of battery power...or you can make your own PWM controller. It will not be a "Smart" controller like the expensive Celestron but it will save your battery. There are many YT videos. I bought a few parts here on Amazon and made my own for about $5 net cost. FYI, I had to buy some items in bulk, such as 3x PWMs, 5x project boxes, 12x DC5521 ports. Also with a home made PWM, you have to play with the setting to see what works. The smart controller is great because it automates that, but I'm quite happy with my $5 controller. I've used it successfully a few times so far.

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.

Easy to install - follow the directions. I would run this with a few controller - lots of reports that this running on high will cause star optic abnormalities. It is effective at dew control even at low power use.

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.

Bought this for my 8" SE after encountering dew in the fall here in AZ which was weird. Only use it when we have the possibility of that happening. Install is fast and easy if you take your time and make sure not to move the corrector plate (the glass) at all while you have the original ring off, do it when the front faces straight up

The Celestron Dew Heating Ring is an absolute must-have for anyone who uses their telescope regularly, especially in humid or cool environments. After dealing with dew forming on my corrector plate during several observing sessions, this heating ring has been a game-changer. Installation was straightforward, and it integrates seamlessly with my. The heating is gentle and evenly distributed across the corrector plate, keeping it dry and clear throughout the night. I especially love that it doesn’t require constant monitoring—it just works. Pairing it with a Celestron power controller gives you more flexibility in adjusting the heat levels based on the conditions of the night. Since using this, I’ve had far fewer interruptions in my sessions, which has greatly enhanced my stargazing experience. Highly recommended for all astronomers who want to make the most out of every night, regardless of dew conditions!

Bastante bueno, sí calienta, aunque aún no lo pruebo en noches con mucha neblina

Great product easy to install, but please follow the instructions

I bought this Dew Heater ring for my older Celestron C9.25 XLT (non fastar compatible OTA) The product came well packaged and arrived quickly. The instructions were adequate, and if you need a little more help, there are several videos on YouTube. To be honest installation was simply. I simply pointed the OTA to Zenith (straight up), removed the screws carefully (without the included protective piece of paper), slightly flexed the original ring to help remove it, and the reverses the installation process aligning the Dew Heater Ring plugs at the 6'oclock position. This allowed me to run the power cable out between the Celestron Dew Shield cutout, and alongside/parallel to the Celestron losmandy dovetail bar and back to my SVbony power hub mounted on the top of the OTA opposite to the finderscope. I run the heater ring with another SVbony power cable with in-line adjustments (low-med-high-off) and it works perfectly in our Pacific Northwest. I've had the Dew Heater ring for a little over 6 months, and its functioned perfectly, and I like the tidy look and simplicity of the system. I will be buying another ring for my C11 EdgeHD.

Passt 100% erfüllt seinen Zweck nie mehr ohne in der kalten Jahreszeit