Celestron 94021 Aluminium Telescope Dew Shield with Cover Cap, Fits 8” Schmidt Cassegrain, EdgeHD, and RASA telescopes

I’m very pleased with the fit. Perfect alignment and easy engagement. It seems very secure on my NexStar 6se OTA. Had it out this morning and had no light leak issues. It’s worth the money spent. I’ll get one for my next larger scope.

I have various SCTs including 8", 11", and a 14". This by far is the most well designed dew shield I have owned for those scopes. It is stiff enough so will hold up to some abuse, I like the side port to run cables out as use it in Hyperstar mode so need to get the camera USB, power, and also the internal Celestron dew heater ring cables out of the shield. It fits well and the clamping mechanism is good. One big plus is that they include a nice aluminum cover. Since the stock cover won't fit on the dew shield I always had to make my own caps for my other scopes which is a pain. I could remove the dew shield on the other scopes and use the stock cover but that is an issue with Hyperstar as I do NOT want to remove the camera, Hyperstar, etc. every time I want to cover the scope after using it. I haven't found any negatives although I did decide to put some Rrvnuts with plastic thumb screws on the dew shield so I could ensure a tight and secure fit so it wouldn't get knocked off as I covered the scope for the night. The stock clamping setup is pretty good but I wanted the extra peace of mind ;-)

Good product I hpe it is not not heavy to work with Celestron CPP 9.25 XLS GPS

The only reason for not giving this 5 stars is the cable pass through is not light tight and there is a gap, a narrow one running about four inches from the cable port. The RASA is strictly an imaging scope and the snug cap for this hood should make it easy to take dark frames with the camera still on the scope. True you can stuff the cable port or slide a thin strip of something into the gap, but a factory fix would be the better choice. True I can glue some felt in to block most of the light, but this could have been done by Celestron. The hood snaps into place, square to the ends of the bars and nicely registered on the swell of he corrector cell. A curb or ridge around the inside at the right distance from the end would act as a field stop to block stray light. Finish excellent, fit almost right. End cap snug. I will keep this hood and make a DIY fix for the light leak. But Celestron if you read this, you need to bring out V2.

Works well enough as a dew shield. I do like the side port for the dew heater ring, and it does allow enough room for camera cables when using a Hyperstar 4. The Hyperstar was my main reason for purchasing this dew shield. Since it has a dust cap, it allows me to leave the hyperstar attached and not have to worry about dust on the corrector plate. Fitment could have been a little better. There are lots of gaps around the edge that let in light. Which ruins dark frames. You will definitely have to cover those. And if you're running a cooled camera for dark frames with the hyperstar, heat can't dissipate with the end cap on. So you'll have to watch that carefully. Other than those couple things, it works great and it looks nice as well.

I bought this for two purposes: First, during a night of viewing in Western Washington's wet air, this keeps the lens from fogging up on my EdgeHD 11" (which it certainly did without any protection). Secondly, for calibration exposures, especially flats: It is very handy to point the OTA straight up (Zenith), put a few layers of white paper or cloth over the top and an A2 format tracing panel on top of that to sequence a number of "flat" exposures for calibrating the extreme concentric gradient or the SCT in the astro-photos captured in a session. It works great for that. (Make sure to put some Gorilla tape over the cooling light on a ZWO cooled camera and lay some dark paper or cloth over the camera to keep from getting a red reflection glow in your flats. The only caveat is that, for "dark" calibration frames, it leaks light and will require some effort seal off all of the places (around the edges at the OTA and around the cap) that may be leaky. So, for dark frames I just parked the OTA in the horizontal position, unscrewed the camera and capped it, and laid the camera inside the OTA to expose the darks and biases--after waiting for the sensor to cool again.

Fit and finish is perfect for your SCT. Snaps right into place and is very secure. A must have for your SCT.

Good fit good quality BUT Too heavy. 8” Nexster starts to slowly drop. If you adjust the center of gravity it makes it unusable for objects approaching the zenith. It causes the scope to hit the bottom of the bracket. I returned it. Looking for a lighter replacement. Update. Five minutes after I shipped it back to Amazon. Celestron support sent me an email saying to tjghten the clutch nut. This tightened up the movement of the up and down axis. Probably be ordering it again.

Fantastic dew shield! Beautiful design. Fits beautifully. Expensive….., yes. But the best you’ll ever own!

Very solidly built, and the front lid closes nicely, neatly hiding the cables for my Dew heater ring. One thing to keep in mind is the weight, so everything is balanced properly.

Great dew cover from celestron also keeps straylight from my telescope

Ottimo prodotto. Protegge il mio telescopio dall'umidità che abbiamo qui in Sicilia.

Livraison super rapide, colis très bien emballé et protéger, et le prix très attractif.