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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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DOBSONIAN TELESCOPE xx REFLECTING TELESCOPE xx TELESCOPE Equipment atlas. How to build a dobsonian telescope. Part 1. Bill of materials for a 10" scope. Estimated cost: $250-$380. Equipment atlas. How to build a dobsonian telescope. Part 2. Build the wooden mounting box and tube box. Equipment atlas. How to build a dobsonian telescope. Part 3. Assemble and align the optics. Make your Dobsonian-mounted telescope easier to use. (1) Storage box for lenses and tools hangs on the side. (2) A friction clamp to keep scope from moving. Build a two wheel cart to transport a Dobsonian telescope. How I built a real live telescope. Tips on building a 10" Dobsonian telescope with a telescoping hexagonal tube. Est. cost: $300. The new generation of Dobsonians are easy to store, transport, setup and use. Photos and text describe several design features which can be incorporated by the telescope builder. Vinyl phonograph record is used along with Teflon pads to form a bearing for a Dobsonian telescope mount. Improving your mount. (1) Build a permanent pier for your equatorial mount. (2) Add setting circles to your Dobsonian altitude-azimuth mount. Build your own "PortaScope". Step-by-step instructions for building a 10" Dobsonian scope that breaks apart for easy transport. Built mostly of plywood, it features a partially baffled two-piece rectangular "tube", 2" focuser, a novel mirror mount for easy collimation, etc. All of the optical components (mirrors, eyepieces, focuser, etc.) are purchased. Est. cost: $625. Part 1. Plywood construction. Build your own "PortaScope". Part 2. Mirror cell and optics. Make your scope light-tight. Wage war against the light pollution bouncing around inside your Newtonian or Dobsonian reflecting telescope. Use baffles, black paint, black velvet, ... etc. to absorb unwanted light. John Dobson describes how the San Francisco Sidewalk Astronomers group got started and how they make their large "Dobsonian" telescopes. Tips on equipping a Dobsonian-style reflector with a circular protractor to measure altitude and azimuth. Then, by means of a star chart and pocket computer, you can locate and/or identify objects in the sky. A Masonite tube for a large (17.5") Dobsonian telescope. Also includes ideas for a unique viewfinder, folding step stool, and an eyepiece turret which holds three oculars. Design for a 17.5" reflector in a Dobsonian (altazimuth) mounting which can be disassembled for travel. A pair of wheelbarrow "arms" equipped with 10" wheels are used to move the assembled telescope short distances. "Pocket telescope". A 14" Dobsonian reflector collapses into a plywood box (21"x21"x22") plus one bundle of eight 57"-long truss tubes. The whole unit weighs just 100 pounds making it very portable and able to be shipped on an airplane. Free-floating Dobsonian telescope mountings. Simple add-on gadgets give the observer complete control over the amount of frictional resistance when a Dobsonian telescope is pushed to follow the stars. A telescoping telescope. A nest of 5 wooden boxes (weighing just 67 pounds and fitting into a 2-foot cube) expands into a fully equipped 14.5" reflector and Dobsonian mount. Est. cost: $60 plus optics. Description of a Dobsonian 10" f/6 reflector includes construction details for the 12-sided plywood telescope tube. Binocular version of a traditional 6" f/8 reflector telescope uses a Dobsonian-style mount. Photos and text describe this amateur-built project, but no detailed instructions are included. Dawn Treader. A fancy Dobsonian telescope features elegant furniture-grade woodworking in the mount and a laminated veneer and fiberglass tube. Christine. An elegant wooden telescope tube and mount which looks appropriate in the living room of a 1902 Victorian house. The mount is dual-purpose (both altazimuth and equatorial). The finder scope attaches by means of strong magnets. Photos and text describe the design and construction. Two lubricants suggested for the bearings on a Dobsonian telescope. Benefits of a split-Dob mount. Add a third axis (the azimuth base of a Dobsonian) to a split-ring equatorial mount to provide the best of both worlds. A do-it-yourself Dobsonian. Product review and assembly tips for the truss-tube telescope kits available from AstroSystems. Teaching an old Dob new tricks. Ten tips for improving your Dobsonian telescope. Woodshop telescopes. Tips on making both attractive and functional Dobsonian telescopes using common woodworking tools. Part of their professional appearance is the two-part polyester (Gelcoat) finish. Improving Dobsonian motion. A remarkable new material (Teflon Sheet) and a basic understanding of friction can improve the bearings on a typical Dobsonian-style mount. A balancing act for Dobsonian telescopes. How to achieve perfect balance using springs instead of heavy counterweights. Comparison of six 8" Dobsonian telescopes. Includes modifications to the mounts which will make the azimuth (side-to-side) motion more responsive and change the stiffness of altitude (up-and-down) motion. Dobsonian mount design allows for two telescope heights, one for standing and one for sitting. Motorizing a Dobsonian. How the stability inherent in a simple altazimuth mount and the convenience of motorized tracking can be had at the same time. A simple truss-tube Dobsonian. This inexpensive conversion can turn your bulky Dob into a lightweight scope. An attractive three-point Dobsonian. How to make an innovative 10" scope whose performance is matched by good looks. Features a six-pole truss system, three-point altitude bearing, and built-in eyepiece-storage compartment. A compact 8" travelscope. This Dobsonian collapses enough to fit into an airliner's overhead storage compartment. A new lightweight Dobsonian. This 10" f/5 truss-tube Newtonian weighs just 25 pounds. Much of the weight saving comes by using "Gatorfoam". Better Dobsonian bearings. Results of tests to determine the best bearing material for use in a Dobsonian-style mount. The Dobsonian telescope. Part 1. Its stability that counts. Reasons for building a sturdy alt-azimuth telescope are discussed. These sturdy telescopes feature a simple mount, simply plywood construction, and often use plate glass mirrors of large diameter (up to 24"). The Dobsonian telescope. Part 2. Detailed text and photographs show how to build your own Dobsonian tube and mounting. How to control friction in a Dobsonian telescope. One method for calculating the force required to move a Dobsonian telescope. Using setting circles on a Dobsonian telescope. A roofers level and a protractor are mounted on a Dobsonian. A pocket computer is used to calculate the correct altitude and azimuth settings. Dobsonian developments. The state-of-the-art in Dobsonian telescopes. Includes details for making and using alt-azimuth setting circles. Includes descripton of a binocular finder scope. An extremely portable 17.5" Dobsonian. The secret is using an open framework tube which also disassembles. An easy design for a truly portable 17.5" reflector. This open-tube, Dobsonian mount scope can be disassembled into small pieces for transporting in a small car. Designing and constructing a 13" Dobsonian binocular. Some tips. 16" Dobsonian on a Pursell platform. Photos and text illustrate some of the details. Transportable Dobsonian binocular telescope features two 17" mirrors. The mirror box doubles as a storage container for the remainder of the optical system. Eight metal tubes and a collapsible rocker (base) complete the framework. SPECIAL ISSUE on Dobsonian telescopes. Advantages of a square (box-type) tube for a Dobsonian telescope. Special issue: DOBSONIAN EVOLUTION. (1) Construction of Obsession 1, a portable 20" f/5 Dobsonion. (2) Refining the basic design to produce a portable 17.5" scope. (3) The telescope is just one part of an observing system. Fitting a Dobsonian with a dew cap, Poncet platform, electric motors and a portable power system. Obsession 2. Construction of a portable 25" f/5 Dobsonian telescope. Designing a breakdown telescope for club use. Design and construction details for an open-tube 17.5" Dobsonian reflector which can be disassembled into 5 packages for easier transportation. Est. cost: $2,500 (Canadian). Building a light-weight 30" Dobsonian. Design and construction advice for a 350-pound portable telescope built mostly of wood. Features a design consisting of four major components (mirror box, rocker box, front cage, and 8 truss tubes). Low-tech R&D and off-the-shelf parts used in the super-big Obsession Dobsonian-style telescopes. A collection of ideas for fasteners, 18-point mirror cell, dew cap, bearings, etc. Includes names and addresses of suppliers. Building a rotating tube Dobsonian using computer-assisted design (CAD) and advanced woodworking methods. This 16.5"-diameter open-tube design allows the eyepiece to be positioned anywhere around the circumference for most comfortable viewing. | |||||||||
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