As mentioned above, I personally own the largest version of this cover and use it for my Celestron Advanced VX 9.25″ SCT. It’s been great.

We also measure the Power with our systems which is essentially the error from the reference sphere to the test optic. The reference sphere we use on our system is a very high quality sphere so the closer to zero the Power, the less error between the 2 elements thus ensuring a higher quality optical surface. The inner liner radiant barrier provides radiant heat protection, effectively protecting your equipment from radiant heat build up. Additionally, as a second inner liner it provides additional protection from water penetration. TeleGizmos standard Solar Scope Covers - These are designed for temporary short term telescope protection only. They are not designed to protect a telescope left exposed to the elements outdoors on a 24/7/365 basis. The Standard TeleGizmos covers are intended for periods of outdoor exposure not to exceed one to two months of continuous 24/7 use. The other one is huge, and I would have thought would cover most telescope/mount combinations. It also comes in a more lightweight version. Here's a link to the larger one I found if anyone is interested. For refractor telescopes, the length is going to be very close to the telescope’s focal length so just knowing that will tell you if the cover will fit.Orion offers telescopes for every level: Beginner, Intermediate, Advanced, and Expert. From our entry level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessories, you can find the best telescope for you. Because we sell direct, we can offer you tremendous value at a great price. Not sure how to choose a telescope? Orion's Telescope Buyer's Guide is a great place to start. A dust cover by Astrozap is a great idea for keeping dust off your RC telescope. The sewn-in elastic band fits perfectly over the end of your telescope tube, preventing dust from settling on your optics and degrading image quality.

Many thanks to all those have replied, you've all really come up trumps with lots of useful solutions.Once the Zygo test report has been completed, the optical alignment is thoroughly tested and tuned to ensure they are spot on before they leave us. Astromania offers this cover in 3 different sizes, 23.8″, 30.1″, and 37.6″. The one linked below is the 30.1″ version that will fit telescopes of up to 1000mm in length and 203mm of aperture that will fit most hobbyist-level telescopes. Still, measure yours just to make sure before buying. Orion offers telescopes for every level: Beginner, Intermediate, and Advanced. From our entry-level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessories, you can find the best telescope for you. Because we sell direct, we can offer you tremendous value at a great price.

The TeleGizmos Telescope Cover is a multi-layer, polyethylene material with a fully aluminized surface. The heat reflective ability of the cover is extremely high with a material strength equal to a multi-layer light weight tarp. The material used for Telegizmos Covers was originally developed for NASA as an insulator in spacecraft. It is very strong, light, tear and puncture resistant and is highly superior to Mylar in durability. I’d say yes. If you have already invested hundreds or even thousands of dollars into a telescope, spending a small fraction of that to keep it safe is worth the money. These superior quality telescope covers by Telegizmos are the best covers on the market that you can buy. They are designed for severe weather protection and provide years and years of protection even when left out all the time. The outer polyester cover is the highest quality acrylic coated weave. This American made material offers exceptional resistance to mildew and UV as well as superior strength and abrasion resistance. Less than 1% shrinkage or stretch assures continuous proper fit. The water resistant capabilities of this material are outstanding...tested and shown to not allow moisture penetration from a spray test at 40 PSI, 1/2 inch concentrated stream.

There are so many specialty accessories in the astronomy space that are completely unnecessary (I’m looking at you, “telescope gloves”) and we generally tell you to save your money and spend it on gear that is truly going to make a difference on your viewing experience, but that’s not the case here. Safety equipment does matter and is going to save you money long-term by increasing the longevity of your device. Telescope covers vs Bags Again, most people agree that the best answer if you plan to consistently stargaze is “try both”. Best Telescope Covers