Amateur Telescope Making in the Internet Age: Finding Parts, by Robert L. Clark

By Robert L. Clark

The net Age is altering every little thing approximately human invention and using know-how. The swap has been in comparison to that of the creation of printing. Making your personal telescope isn’t what it was, both, thank you in part to the web. The outdated days of grinding and sprucing are long gone – until you need to do it! now you can gather an exceptional tool from a variety of cheap Internet-available parts, new or used. the web is the hot components “junkyard,” with stuff from around the world so that you can choose via, day or evening. during this publication you will discover out what’s usually to be had and the way to entry it. you'll review optical parts and mix them from different net resources. you'll get many principles on how you can make the components that you simply don’t purchase or scrounge and the way to revive outdated lenses and mirrors. and you'll study a few uncomplicated physics of designing ergonomic – cozy – telescopes. Navigating your approach round the percentages is simple utilizing this worthwhile and well timed source. With Robert Clark’s assist you can get the simplest that the web has to provide. start now!

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Example text

That is what the screw was used for when the lens was in its first incarnation as a camera lens. Focuser Part of the camera lens for the normal eyepiece. A sliding tube for 1 1/4 inch eyepieces. One of the most frequent uses for this telescope is for solar projection. Mechanical Parts Tube Built from wood with plywood front and back. The back of the tube can accommodate a back plate with a star diagonal or an alternate back plate for 1 1/4 inch eyepieces. It could also accommodate a camera back.

The faster instruments of today represent, in part, a concession to portability. A Real Simple Telescope 31 3. Get the lenses out of alignment. Do something to get the objective lens out of parallel with the eyepiece lens. You may be able to squeeze the side of a cardboard tube to get one side tilted in towards the eyepiece by about 1/4 of an inch. You may have to actually remove the objective lens and put it back with a good tilt. Even more than 1/4 inch is fine. We are giving your telescope a good case of astigmatism, so we might as well make sure it is easily detectable.

1). The Newtonian design is used by more amateur telescope users than any other design. This is true for both serious homemade ‘scopes and commercial ‘scopes. Dobsonian telescopes are Newtonians but on a special mount. If the f ratio of a Newtonian is less than about f8 the objective (often called the primary) needs to take the form of a parabola rather than that of a sphere. The common approach to producing a parabola is to first make the sphere similar to the desired parabola, then “figure” it into a parabola.

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