Download Amateur Telescope Making (The Patrick Moore Practical by Stephen Tonkin PDF

By Stephen Tonkin

This ebook presents an advent to the layout of numerous telescopes, mounts, and drives appropriate for the home-constructor. initiatives contain tools that diversity from a shoestring finances to expert units that aren't commercially to be had. The ability point of every undertaking is indicated and suggestion is equipped as to what's brilliant to build, given what's commercially to be had. tricks and counsel are integrated, in addition to listings of respected mail order resources of fabrics and parts.

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Additional resources for Amateur Telescope Making (The Patrick Moore Practical Astronomy Series)

Sample text

While others, such as Thane Bopp, had previously made two-spar systems, Ron Ravneberg's "Alice" raised the design to an art form. 125 in (3 mm) thick, of 2 in (50 mm) OD. 5 lb (3 kg). 5 in (12 mm) birch plywood, sits on the outside of the aluminium pipes. Along the outer edges of the focuser board are parallel pieces of aluminium channel screwed to the board with the opening of the channel facing the pipes. 8 Reflector purchased from the Reid Tool Company. The system allows quick takedown and reassembly with repeatable, accurate alignment.

You can determine how long this needs to be by putting your eye up to the racked-in focuser (without an eyepiece in place) and looking past the secondary, out of the top of the tube. With a ruler held against the tube opposite the focuser, you can see how long the extension will need to be. 4 The removable tube extension Building a High-Contrast Planetary Newtonian The Payoff So does the view justify the effort? Absolutely. This telescope is the finest 6-inch I have ever looked through. With a high-quality Orthoscopic eyepiece, the views are remarkably contrasty and sharp.

This initial discovery inspires creativity in the adaptation of everyday materials, and so the telescope develops. A star-party report in the News and Notes of the astronomical society to which I belong made reference to a telescope that appeared to be constructed from "an old aero lens and plumbing bits". " I have to confess to experiencing similar pleasant surprise when I gave it first light. The Objective Lens Friends and relations well know that I am always on the lookout for anything that might be usable as part of a telescope, so I was not overly surprised when my sister-in-law telephoned to say that she had found something in a junk shop.

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