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

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 creation of printing. Making your individual telescope isn’t what it was, both, thank you in part to the web. The previous days of grinding and sprucing are long gone – except you must do it! now you can gather a superb tool from quite a lot of cheap Internet-available elements, new or used. the web is the hot elements “junkyard,” with stuff from worldwide that you should decide via, day or evening. during this publication you'll find out what’s in most cases on hand and the way to entry it. you are going to the best way to assessment optical parts and mix them from varied web resources. you'll get many rules on easy methods to make the elements that you simply don’t purchase or scrounge and the way to revive outdated lenses and mirrors. and you'll research a few common physics of designing ergonomic – cozy – telescopes. Navigating your manner round the percentages is simple utilizing this beneficial and well timed source. With Robert Clark’s assist you can get the easiest that the net has to provide. start now!

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Additional info for Amateur Telescope Making in the Internet Age: Finding Parts, Getting Help, and More

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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.

Then go a little out of focus the other way. This should involve sliding the tube only about an 1/8 of an inch each way. Look for rainbow colored fringes around the image of the bright light. These will go from red to blue as you go from inside of focus to outside of focus. The problem is chromatic aberration, caused by the fact that glass bends light slightly more or less depending on the color of the light. The white light you are looking at is broken down into its various color components by the objective lens acting as a prism.

It may not be very apparent, but the effect is to significantly reduce the resolution offered by the image. Get as good a focus as you can on a star in the center of the field of view. Without changing anything look at stars near the edge of the field. They may look like birds with two wings, flying toward you or away from you. They also may look like comets with their heads pointing at the center of the field and the tails pointing outward. Most likely they will take on some of both distortions and look like smudges.

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