How to Build a Dobsonian Telescope

Автор: Ray Cash-Le Pennec
Издательство: Sidewalk Astronomer
Год: 2001
Страниц: 98
Размер: 0,73 МБ

The plans you will find on these pages, are, by and large, the result of years of trial and error on the part of John Dobson, one of the founders of The San Francisco Sidewalk Astronomers and a prolific telescope maker. John has, quite literally, helped thousands of people make telescopes of this design! Only in the past few years have commercial telescope manufacturers adopted the Dobsonian approach to make affordable, alt-azimuth Newtonian telescopes... However, the three top manufacturers (henceforth referred to as: "The Big Three"), Celestron, Meade, and Orion, continue to fall short mechanically of the simple designs found on these pages. All of The Big Three, for example, use Melamine; a kind of coated particle board, which is heavy, not durable, in short; not as strong or light as plywood, which, of course, we recommend. All of The Big Three have undersized pivot bolts, do not use Teflon as bearing surfaces (there is no substitute!), and have shoddy mirror cells (tailgates). The list goes on... They do look "pretty," especially in photos; I'll give them that. If you happen to own one of these scopes; you might well peruse these pages to find ways to tinker and fix up your mass-produced Dob: you can only improve what you got! It ain't rocket science!