In the field of amateur telescope making most, if not all, of its design features had been used before. Dobson himself identified the characteristic features of the design as lightweight objective mirrors made of porthole glass , and mountings constructed from plywood , Teflon strips and other low-cost materials. Dobson optimized the design for observation of faint objects such as star clusters , nebulae , and galaxies what Amateur Astronomers call deep sky object s. These dim objects require a large objective mirror able to gather a large amount of light. Because "deep sky" observing often requires travel to dark locations away from city lights, the design benefits from being more compact, portable, and rugged than standard large Newtonian telescopes.
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Note: Activation requires a response to an email that we will send to this address by David Kriege and Richard Berry, 6" by 9" inches, pages, hardbound, pictures, 88 drawings and 34 tables. Every step of construction is detailed in photographs and diagrams, and the underlying ideas are carefully explained.
As a result of this three-year collaboration between authors David Kriege and Richard Berry, experienced and well-known telescope makers, you now have the opportunity to build a high-performance telescope from 14 inches to 40 inches aperture based on the thoroughly tested designs described in this book. Amateur astronomers at the time were so amazed that a telescope built from simple, inexpensive materials performed so well that they could hardly believe their eyes.
As home-built Dobsonians started showing up at star parties across the nation and people saw what Dobsonians could do, the word spread. In just a few years, the Dobsonian revolution swept the world.
Since those early telescopes, Dobsonians have improved dramatically. For example, it is possible to build a telescope of 20 inches aperture that is compact enough to transport in a hatchback automobile, yet takes only ten minutes to set up at a remote, dark-sky observing site. Deep-sky observers especially appreciate Dobsonian telescopes. With the inch 50 centimeter aperture that the authors recommend for first-time Dobsonian builders, hundreds of globular clusters, thousands of nebulae, and tens of thousands of galaxies are visible through the eyepiece.
Planetary observers have discovered that from good observing sites, Dobsonians deliver breathtaking performance on the moon and planets.
For the casual stargazer, familiar objects like the Hercules Cluster, the Great Nebula in Orion, the Lagoon Nebula, and the galaxies of the Virgo Cluster are an entirely new experience.
Here are some of the topics covered in this book: Deciding what size telescope will suit your needs Ordering optics for a large Dobsonian Understanding plywood and how to use it properly Making a flotation cell to support the primary mirror Figuring how long to cut the poles for the truss tube Constructing precision truss tube sockets Performing torque analysis for first-time balance Installing precision digital setting circles Setting up and taking down the telescope How to collimate your optics correctly Whether you have never observed before or whether you have been an amateur astronomer all your life, you will benefit from the hands-on familiarity and experience in amateur astronomy and telescope making that the authors bring to this book.
From The Reviewers This book is full of exceptionally useful advice and ideas, and is not only for those planning to build a telescope from scratch, but for anyone with a Dobsonian telescope of whatever design, who wants to see how they could improve its workings.
Overall The Dobsonian Telescope is a terrific volume and wonderful accomplishment with little to criticize. It belongs on the shelf of every amateur telescope maker, and for that matter every Dobsonian owner.