By Stephen Tonkin
This ebook presents an advent to the layout of a number of telescopes, mounts, and drives compatible for the home-constructor. tasks contain tools that variety from a shoestring finances to expert units that aren't commercially on hand. The ability point of every undertaking is indicated and suggestion is supplied as to what's good to build, given what's commercially on hand. tricks and assistance are incorporated, in addition to listings of respected mail order assets of fabrics and parts.
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Extra info for Amateur Telescope Making (The Patrick Moore Practical Astronomy Series)
This unequal spacing is useful for ensuring that the arrangement can only be assembled in one orientation. I bolted the tin to the pan reducer, but not the pan reducer to the soil pipe. A glance down the draw-tube revealed that there were no nasty internal reflections, mostly, I think, owing to the light-baffling nature of the internal flanges on the plumbing parts. The Focuser I initially made a rack-and-pinion focuser from 31/2 in (90 mm) length of 11/4 (32 mm) OD brass tubing. This does not accept the standard l1/4 (in eyepieces, so I constructed a star diagonal from some 11/4 in ID brass tube salvaged from an old film projector.
If the very thought of going near these pristine shiny mirror surfaces with matt-black paint makes you break out in a cold sweat, skip these steps. There is no point in making a nervous wreck out of yourself for the sake of improved baffling! Two remaining sources of stray light lie at either end of the tube. Look down the front of your telescope. Is it Specialised Telescopes possible to see past the primary mirror and out of the back of the tube? If it is, you'll want to take care of this, since a substantial amount of light originating from this location can reach the focal plane.
It was then that I discovered the telescope making forum on CompuServe. 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 (The Patrick Moore Practical Astronomy Series) by Stephen Tonkin