By Peter L. Manly
Many beginner astronomers make their very own tools, both as a result of monetary issues or simply because they're simply . novice Telescope Making bargains various designs for telescopes, mounts and drives that are appropriate for the home-constructor. The designs diversity from easy to complex, yet all are in the variety of a reasonably well-equipped domestic workshop. The publication not just tells the reader what he can build, but additionally what it's good to build given what time is accessible commercially. hence every one bankruptcy starts with purposes for project the undertaking, then seems at theoretical attention prior to completing with functional directions and suggestion. a sign is given as to the talents required for a number of the initiatives. Appendices record respected resources of (mail order) fabrics and elements. The telescopes and mounts diversity from "shoestring" (very affordable) tools to expert units which are unavailable commercially.
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Extra info for Amateur Telescope Making (1998)(en)(259s)
Tube components were found. Although the lens cell is a tight fit in the pipe at room temperature, I did not trust friction alone to hold things together, especially on an instrument that would be used on cold nights. I had a section of plastic pipe that almost fitted over the soil pipe, so I cut a ring from this and split it to make a sliding collar that could butt up to the flange on the pipe. Three L-shaped aluminium struts secure the collar to a flange on the lens cell. A nut and bolt tighten the collar onto the tube via two small pieces of aluminium angle, one of which is secured to each end of the collar.
The rocker assembly pivots on three equally spaced pieces of Teflon attached to the ground board. Counterbalancing After construction, the scope seemed to be too wobbly, and vibrations were slow to dampen. The focuser side of the scope weighed at least 13 lb (6 kg) more than the opposite side. A conventional eight-tube truss system distributes the weight more evenly around the optical axis. The extra 13 lb on only one side of the optical tube assembly of Skinflint created the instability. Counterweighting the side opposite the focuser board with lead shot in PVC tubing eliminated the problem.
A familiar name appeared regularly, giving advice to all who asked. I recognised his name, Tom Waineo, as that Shoestring Telescopes of a contributor over the years to Sky & Telescope magazine. Tom had retired from a career as a professional optician, and was spending his time helping amateurs with advice and making custom mirrors. Both Tom and I used Dick Suiter's Foucault reduction program ADMIRR. With my Foucault readings sent via Email, Tom could instantly see the same profile that I was seeing, 500 miles away.
Amateur Telescope Making (1998)(en)(259s) by Peter L. Manly