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. I realize I won't be doing much observing near the horizon, but there may be the odd occasion to be near that, so I'm trying to figure out a strategy to comfortably allow viewing in most orientations of the scope. 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 The company also offers two more astronomy observing chairs. The Vestil CPRO-600 provides a wider range of seat adjustments, while the Vestil CPRO-200 is the most compact chair from the entire range and a great choice if you often travel. At Rother Valley Optics, one thing we pride ourselves on is customer service and quality of our equipment. When we test your telescope, we will ensure that it is of the highest quality otherwise, we will reject the scope under our strict quality control and test another model for your peace of mind. One of the main values to look at when testing a refractor is the Strehl ratio. The higher this number, the higher quality lens you have. At Rother Valley Optics, we will guarantee the highest possible Strehl ratio for your telescope. We will aim to provide 0.95 Strehl or higher on Takahashi, RVO Horizon, William Optics and many more! Generally, the higher the Strehl ratio, the lower the Astigmatism and Coma meaning a better image quality from your instrument.

While the material is durable and capable of withstanding most weather situations, the cushioning itself is fairly thin and not the most comfortable.It mentions a weight limit of 220 lbs, but some users report it being able to hold up to 250 lbs (not recommended though). This chair is a simplistic design, but it works precisely as it’s intended. 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.

It’s an astronomy observing chair that’s very simple to use. Thanks to its simplistic design, it’s easy to set up and equally easy to fold in its portable shape. It has a nicely padded seat that will provide you with decent comfort while you’re sitting on it and a maximum weight capacity of 300 pounds.One thing to take into consideration if you're a naked-eye observer is that it will help if your stargazing chair can recline. While using a chair for astronomy isn’t the most labor-intensive, you’ll want something made with durable and resistant materials.You’ll need a chair that doesn’t start falling apart after a few uses outdoors and is resistant to rust or corrosion. 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. So, now that you’ve learned of the importance of astronomy observing chairs when it comes to comfortably watching the stars in all of their wonders, you are now ready to take matters into your own hands and use the newly received knowledge in helping you decide which one is the right for you.

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. Since telescopes require regular adjustment, you’ll want a chair that’s adjustable as well. An astro chair with little to no adjustment capability is about as useful as a fixed telescope! Adjustable chairs are also often collapsible, which is an essential feature if you plan on frequently changing locations. 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. 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. 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.The bottom of the chair has a splayed design on both ends, which provides additional stability on uneven terrain. I've been looking at these Catsperch chairs (I know there are other options, but these seem very sturdy and well made) and I'm not sure whether to get a shorter one with a max seat height of 32" to deal mainly with objects near the zenith, or get the larger "pro" model with a max height of 46"? 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 The chair itself is made from steel and is quite sturdy and durable, making it suitable for extended outside use. The padding is a bit thin on the seat itself, though, meaning it’s not the most comfortable observing chair around.