Celestron Dew Shieldキット キャップ付き - 11インチのSchmidt、EdgeHD、RASAに適合

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

Excellent product I'd recommend for any telescope enthusiast. Great saving by buying through Amazon and speedy delivery even from across the pacific Ocean!!!

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.

Side clips are weak. I used a strap around the Dew Shield and OTA to hold it in place. Disappointing considering the price

I have wanted this for some time as I image with a hyperstar and like many of you I don’t want t to tear down the camera and wires, etc. every night. I wanted something that would last and have a cover to keep out dust etc while I use an our door cover for my scope. I love Celestron gear and I don’t have unrealistic expectations as things like this happen. I’m including pictures of what was wrong so that Celestron can see what happened if they want to fix this at the factory level for quality control, but also so if someone else’s gets one like mine they don’t waste so much time trying to figure out why the dew shield wouldn’t seat all the way down…It will, but only if I remove the dew heater clip. Just so the picture makes sense, on the inside of the cap that lets the dew heater wires out you can see they didn’t. Cut the slot big enough so the dew shield can’t go over the wire clip. There are several other reviews about the light leakage so I put a bright post it note behind the gap so it is easy to see. I added a picture and marked in yellow where it should have been cut out and drew a red arrow where the wire clip hits the dew shield. Everyone that does astrophotography is used to adding gaskets, velcro and tape to nearly everything. I will add something to block out the light leak, but I wish this was already dealt with. :-). I gave it a 3 star rating for now and asked for a replacement. I’ll rate this higher if the replacement is usable.