By Stephen Tonkin
This ebook offers an creation to the layout of quite a few telescopes, mounts, and drives compatible for the home-constructor. initiatives contain tools that diversity from a shoestring price range to expert units that aren't commercially on hand. The ability point of every undertaking is indicated and suggestion is equipped as to what's good to build, given what's commercially on hand. tricks and counsel are integrated, in addition to listings of respected mail order assets of fabrics and elements.
Read or Download Amateur Telescope Making (The Patrick Moore Practical Astronomy Series) PDF
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Extra info for Amateur Telescope Making (The Patrick Moore Practical Astronomy Series)
It is also worth while to blacken the bevel on your primary mirror with a black chisel-point felt marker or a small brush loaded with matt-black paint. This is most easily done with your arm braced and the mirror slowly rotating on a Lazy Susan bearing or other turntable. Similar attention should be given to the secondary mirror's rim. Some secondary holders leave only the functioning aluminised surface exposed, but if yours does not, carefully go over the partly aluminised edge area that faces the focuser.
As suggested by David Kreige's article in issue 35 of the no-longer-published magazine Telescope Making, I mounted one end of the sling through a threaded rod split with a hacksaw blade. From the outside of the mirror box, the split threaded rod's rotation controls sling length. A nut on the inside of the box helps to lock the rod in place. 25 in plywood. The "points" are the vinyl-covered heads of thumbtacks. 2 The primary mirror cell, showing the 18-point suspension and the broomstick sections mentioned in the text "teeter" or balance bars from aluminium scrap.
There is also a sense of satisfaction from using simple tools and economical materials to make an instrument capable of viewing reaches of the universe as they appeared millions of years ago. The educational process of making this mirror has fuelled a desire for bigger and better. Judging from the reaction of my friends and family as they stare at deep sky wonders through the eyepiece, Skinflint is an unqualified success. Perhaps others will be inspired by the success of the contributors to this book to craft their own cosmic voyagers for destinations unknown.