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It’s lightweight and foldable, though the description is a tad misleading, as it doesn’t fold completely flat (about an extra 4-inch profile when folded). The chair itself is made from steel and is quite sturdy and durable, making it suitable for extended outside use.

The seat is highly adjustable, from 9 inches up to 32 inches, which allows easy viewing for a wide variety of telescope eyepiece heights.

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The seat’s position can be adjusted in a range of up to 10 inches, which isn’t a lot, but that’s unavailable when you’re dealing with a chair that targets portability above everything else. There are also rubber feet on each of the legs, so you won’t have to worry about stability at all.

Unlike our previous entry, the Starbound Astronomy Viewing Chair can be fully collapsed, though you do have to take the seat off first. Overall, this seat is a sturdy and comfortable telescope observing chair, but it is priced a bit higher than others. You will also see some more values such as Astigmatism and Coma. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. These are values which ideally would be at 0 but as our test optics are all curved lenses, there will always be astigmatism and coma present. The lower the number, the less of these aberations you will effectively see but with most refractors, you can buy field flatteners which will compensate for the coma anyway. The astigmatisms value is explaining the error between the symmetrical curvature of the lens. Basically, no lens will be perfectly symmetrical, the lower the astigmatism, the more symmetrical the lens surface is. Adjustable chairs should be easily mobile and compact with a flat or near-flat profile, so it’s easy to lug around. They need a broad range of motion, so you can remain seated at a variety of heights. Observing the universe with your own two hands and some equipment is an endlessly fascinating experience. Finding a perfect spot, getting your telescope all set up, and spending hours gazing into the cosmos is likely never to get old.While it is a little on the heavier side thanks to its solid metal construction, it still folds to a very compact size. Thanks to its vinyl seat, you can be sure that it will be fairly comfortable to sit on and easy to clean due to its slippery texture. It has a splayed design on both ends of the feet, making it extremely stable for a variety of environments. The chair’s also entirely foldable and portable with a 4” profile, though, at 22 lbs, it is a bit heavy to lug around. While the material is durable and capable of withstanding most weather situations, the cushioning itself is fairly thin and not the most comfortable.

If durability is something you’re looking for in a chair that will satisfy all your needs when it comes to observing the stars, then the Starbound Astronomy Viewing Chair should be on the top of your list. Other measurements such as the PV and RMS are important too. With these measurements, the lower the number the better as it shows less curvature on the lens. The flatter an optical lens, the better it will perform. The PV rating (Peak To Valley) is a measurement from the highest point (Peak) to the lowest point (Valley). From this we get the RMS (Root, Mean, Square). This is a similar figure to the PV and measured exactly the same way. The RMS is basically an average height difference from the PV so again, the lower the better. As you can see form the example below, we measured an RMS of just 0.027 wave which is a very good value. I recently aquired a 6" f12 refractor where, with the mount I'm using (Losmandy G11 w/ HD tripod and 12" pier extension), the eyepiece height at zenith is about 30" above the ground and when pointing the scope near the horizon, the eyepiece is about 15" over my head (I'm 6'1"). The Vestil CPRO-800LP Ergonomic Observing Chair is one of the finest affordable observing chairs on the market. For telescope observing, you will need a good adjustable chair so that you can change the height of your seat, enabling you to adapt to whatever position your telescope happens to be pointed.

When it comes to designing and building your own binoscope or binocular telescope, you generally start with several ideas in mind before you actually settle on one. Sometimes it takes a while to really decide which idea or design you want to go with. It becomes almost confusing sometimes when you look at recent astronomy magazine or book on telescope making and see so many excellent examples of homemade telescopes, Dobsonian or otherwise. Trying to decide which design, type, or style of telescope or binoscope you want to build really comes down to the amount of resources you have available plus the amount of spare time you can afford to spend building it. Resources as I like to call it can have two or three meanings: one is how much money are you able to invest in building it and the tools you have available that will be needed to build it with, and last but not least, how much desire and enthusiasm do you have to start and actually finish your telescope building project. All of these are important resources and you have to weigh each with an equal amount of importance before you start your telescope building project. Once you start your telescope or binoscope building project, you don’t want to stop its progress because of something you hadn’t planned for earlier. Once you have decided on a particular binoscope or binocular telescope design, then comes the fun part, getting started on it. Keywords There are plenty of chairs on the market now that are specifically designed for extended stargazing. But which one’s are the best? Does getting an observing chair really matter? Or can you just use a regular chair? We’ll answer all of these questions and more in this guide covering everything you need to know about astro observation chairs! We Recommend Weight limit: up to 250 lb (220 lb is manufacturer recommended limit) 2. Starbound Astronomy Viewing Chair The easiest way to spot a truly ergonomic chair is how it looks. Some ergonomic chairs look like modified office chairs, but the most posture-efficient chairs often look a little odd, with extra padding in specific locations for additional support or other interesting design choices. Your observing chair needs to be comfortable But it's also important to have a suitable place to sit while you gaze through the eyepiece or stare up at the night sky. Credit: Will Gater