By Robert L. Clark
The net Age is altering every thing approximately human invention and using expertise. The switch has been in comparison to that of the advent of printing. Making your individual telescope isn’t what it was once, both, thank you partially to the web. The outdated days of grinding and sharpening are long past – until you need to do it! now you can gather an exceptional software from quite a lot of reasonable Internet-available elements, new or used. the web is the recent components “junkyard,” with stuff from worldwide so you might choose via, day or evening. during this ebook you will discover out what’s usually on hand and the way to entry it. you are going to how one can assessment optical parts and mix them from different net resources. you'll get many rules on the way to make the elements that you simply don’t purchase or scrounge and the way to revive outdated lenses and mirrors. and you'll study a few easy physics of designing ergonomic – cozy – telescopes. Navigating your method round the chances is straightforward utilizing this useful and well timed source. With Robert Clark’s assist you can get the simplest that the web has to supply. start now!
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Extra resources for Amateur Telescope Making in the Internet Age: Finding Parts, Getting Help, and More
If you use a lens that was not originally intended for a telescope you still may get a pretty good telescope. Telescopes with such salvaged lenses are often called “copyscopes” because junked office copy machines are often the source for the lenses. As a matter of fact a copier lens is designed for about “one to one” projection. This is not quite ideal but will work. The job of a telescope objective is to accomplish an “infinity to one” projection. A good-sized projector lens or even a really big camera lens may be better.
That kind of softness might not be so obvious if you had not seen it in the star images. Astigmatism is, by far, the most common of the aberrations that cause telescopes to fail. Astigmatism can also be a defect of the human eye. If your eyeglass prescription has a term for “cylinder” your glasses are correcting for your astigmatism. A later chapter will provide ideas on how to build the correction into an eyepiece. An alternative to the use of a big magnifying glass as an objective lens is to use a lens intended for eyeglasses.
The smaller the pinhole the brighter the object has to be to get an image at all. If you repeat the previous experiments you will be able to appreciate the fact that most of the aberrations came from the objective lens. It should be pretty obvious that the “One Lens Telescope” is unlikely to become one of the more popular telescope designs. But it does prove that it can be done! Chapter 4 Build a Good Copyscope The name “copyscope” comes from the fact that many of these devices were made using the glass from old copier machines.
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