|
 |
 |
 |
|
 |
|
 |
|
|
Last Updated
03/31/2019
Sitemap
|
|||||||||
Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
|||||||||
|
REFLECTING TELESCOPE sa COMPOUND (CATADIOPTRIC) TELESCOPE sa DOBSONIAN TELESCOPE sa TELESCOPE MIRROR sa TILTED-COMPONENT TELESCOPE x NEWTONIAN TELESCOPE xx TELESCOPE How to plan the construction of a Newtonian reflector in ten easy steps. Tips on building an 8" reflector for astrophotography. Do you really need an RFT (rich-field telescope)? The mathematics of exit pupil, aperture, and magnification are investigated to determine the attraction of RFT's. How to convert a Newtonian telesope into a high-resolution, planetary telescope. The refractor advantage: quality over size. Includes tips on optimizing your reflector telescope to approach the quality of a refractor. A telescope for kids. "Kneebiter" is a kid-friendly 8" f/4.5 Newtonian reflector mounted on a Dobsonian mount. Is is assembled from inexpensive commercial optics and ordinary hardware. Product test of Optical Research Corporation's OR-840 Newtonian telescope. Test of twelve (12) Newtonian reflector telescopes each costing less than $1,000 and ranging in size from 4.5" to 10". 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. Inside reflectors. Introduce your child to the sky with a simple telesope. Computing telescope parameters with the OSI Superboard II computer. BASIC program to compute the optical paramaters (F number, eye relief, Ramsden disk diameter, etc.) for a Newtonian telescope. A 200-power, 6" reflecting telescope. Est. cost: $25. Part 1. A 200-power, 6" reflecting telescope. Est. cost: $25. Part 2. A 3" reflecting telescope for $10. How to build a 3" Newtonian reflector telescope. Mirror and eyepiece are purchased. Build a 200-power telescope for less than $50. Part 1. Grinding and polishing the mirror. Build a 200-power telescope for less than $50. Part 2. How to assemble the unit. Open-tube, 2-1/2" reflector telescope. Uses stock optical components. Square "tube" is built from furniture-grade plywood. Weighs only 1-1/2 lbs. and collapses to 10" long for carrying. Est. cost: $10. How to assemble your own rich-field reflecting telescope from purchased optics and ordinary hardware components. Tips on using the telescope to locate and view Halley's comet. A 4-1/2" reflector scope costing between $50 and $139. Details of an observatory built by John Wikswo and his son. Includes instructions on making and mounting a 16" reflecting telescope and the mechanism for rotating the observatory dome. How to construct a mobile telescope. Description of a 12.5" f/8 Newtonian built and mounted on a lightweight boat trailer. Description of a 16.5" reflector with a porthole-glass mirror. Includes a description of the tube and mounting which make the scope suitable for astrophotography. Making an Aplanatic 4" reflector telescope. Much of the tube and mounting is made of finely crafted wood and has the appearance of an antique. Description of a 6" f/6 reflecting binocular with 9X the light grasp of a pair of 7x50 binoculars. The unit is similar to two 6" reflector telescopes working in unison. Optical configurations for astronomical photography. A comparison of the specifications and image quality of eight different 8" f/5.6 photographic telescopes using 8 different optical systems. Description of a "folded Newtonian" plus tips on alignment and baffling. Modifying a reflector for planetary observations. Some tips. Tubeless reflector telescope (8") is built from wood and metal, is simple in design, and is designed to be totally portable. No plans, but photos and text illustrate many design items. A simple coma corrector for Newtonians. How to make a coma-correcting meniscus lens as an add-on accessory for existing short-focus Newtonians of all sizes. Photographs of an open-tube 8" Newtonian telescope that weighs only 19 pounds (less mount). 10" f/5.6 Newtonian features a PVC telescope tube, plywood equatorial mounting, and commercially made optics. Weighs 80-pounds and breaks down into sections for easy transportation. Est. cost: $400. A 17.5" f/4.5 binocular reflector. Wooden mirror compartment doubles as a container for transporting the disassembled scope. Rx for the Newtonian telescope. How to correct coma and eliminate spider diffraction. Notes on fixed telescopes fed by mirrors (siderostat, coelostat, uranostat). Tips on building lightweight Newtonian telescopes (20" and 16"). Both feature bases and fork mounts consisting of plywood over a styrofoam core. They disassemble into three pieces for transportation. Total weight of 20" is 235 pounds. Tip: Use an enhanced-coating reflex mirror (designed for a camera) as the star diagonal in a telescope. Optical layout for an off-axis reflecting telescope which uses only standard optics. A practical and portable Yolo reflector telescope designed for observing the Moon and planets. Make a telescope for $500. Model 1. A report on amateur telescope making. Includes tips on assembling "Minerva", a 6" rich-field reflector on a Dobsonian-style altazimuth mounting. Reflector (8") made using commercial optics. Features a square wooden "tube" and equitorial mounting made of wood-reinforced PVC pipe fittings. Est. cost: $500. Part 2 of a three-part series on amateur telescope building. F/5.6 Newtonian reflector (10") features a stepper-motor drive on each axis. Est. cost: $500. Part 3 of a three-part series on amateur telescope building. An unobstructed Newtonian telescope. Design and construction tips for a telescope for a minimalist. Consists of a primary mirror, secondary mirror and eyepiece attached to a stick and fitted with two support legs. The Fundyscope. A reflecting telescope design which offers a fixed, horizontal eyepiece and the advantage of rock-solid stability at any focal length. All tracking is done by manipulating a control mirror that selects and directs incoming light to the primary mirror. Tips on building a large binocular-style reflecting telescope. An off-axis Newtonian. Design and construction concepts for a telescope with a totally unobstructed light path. It features a tube that is circular at the bottom, but oval at the top. Part 1. An off-axis Newtonian. Part 2. Equatorial mount, collimation and adjustment. A truly economical telescope. Assemble a 4.5" equatorial-mounted Newtonian reflector complete with finderscope and eyepiece. Est. cost: $125. Build a short Newtonian 6" telescope with spherical surfaces throughout. Tips on making both the mirror and lenses. Star-test your telescope. Detailed information and instructions for testing the optical quality of a reflecting telescope. Telescopic performance on the planets. Photos illustrate the effect of a central obstruction and wavefront error on the performance of a reflecting telescope. Large fixed-eyepiece telescope allows observation while sitting comfortably in a heated observing room. A large, tiltable flat mirror directs light into a 20" reflector that is mounted upside down. The basic design concepts and limited construction information are described. 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. An optimized Newtonian reflector. Design and construction details which result in a 6" f/9 reflector that provides refractor-like views of the planets and deep-sky objects. A modified (folded) Gregorian reflector with an 8" f/12 paraboloidal primary mirror and a concave ellipsoidal secondary mirror. The three-piece body and mount weigh about 235 pounds and feature all-wood construction. A scavenger's 12" Newtonian reflector. Includes tips on making a mirror grinding tool from cement and ceramic tiles, a modified Dobsonian mount from recycled lumber, a homemade finderscope, etc. A see-through acrylic-resin tube is useful for showing the operation of a reflecting telescope. Includes tips on construction and educational demonstrations. Joys of a telescope on a deck. Description of an amateur-built 8" f/11 Newtonian all-weather telescope with pipe fitting equatorial mount. The Mersenne telescope. This variant of a neglected design combines the best attributes of both reflectors and refractors. This big-aperture reflector combines a Mersenne primary system with a quality refractor in a Dobsonian-style mount to provide viewing from a seated position. Understanding thermal behavior in Newtonian reflectors. How to remedy thermal problems which can degrade image quality. The little Dob that could. Review of the SkyQuest XT4.5 Newtonian reflector on a Dobsonian mount. Includes simple modifications to reduce the amount of diffraction "noise" in the images and some traces of astigmatism. Newtonian baffling made easy. Home built or commercial measures that will eliminate contrast-killing stray light. Thermal management in Newtonian reflectors. Improve the optical quality by preventing a boundary layer of warm air from forming on the surface of the primary mirror. A roundup of 6" travelscopes. A detailed description of four homebuilt, portable, reflecting telescopes. A hemispheric reflector. This pivoting telescope uses a stainless-steel hemisphere (a lid from a Weber grill) as the base, the housing for the mirror and the support for the two truss poles which carry the eyepiece. An inexpensive 4" f/10 telescope for a beginner. Buy the mirror and build the tube and mounting from plywood and plumbing pipe. A handsome 10" Newtonian, with an electric drive on each axis, yoke mounting (fork mount), and open tube. Photos and text describe some of the details of this scope. Photos of a 14" Newtonian reflector that is easy to build and works well. Features a standard German pipe mounting made from 3.4" industrial pipe. Telescope tube is the outside of a discarded fiberglass water tank. Build this all spherical relay telescope. Specifications are given for a 10", 12.5" and 16" model. The specifications were calculated with the aid of a large computer. Special issue on building big telescopes, those over 12" aperture. Design of a large "small" telescope. A detailed look at the 20" f/5.5 Newtonian reflector built for the Alfred University Observatory (Alfred, NY). A 10" portable open tube Newtonian. The tube is built from wood. A wall-mounted "alignment lathe" made it easier to fabricate an accurate tube. Apollo Observatory's (Dayton, Ohio) 19" Dall-Kirkham telescope. Cooperative building effort between amateurs and a museum. A general description, including photos. Description of the "fourty-feet" reflecting telescope by Sir William Herschel. A historial look at a 50" reflector built in 1785. Photo and letter describe the current status of the Macalester College (St.Paul, Minn) 24.5" reflector. A sturdy 8" f/6 Newtonian scope for the serious beginner. Built mostly of plywood, this square tube unit features slow-motion controls on both axis of the Dobsonian-style mount. Basic components illustrated for making a 3" rich field telescope. Wooden tube and base for a 20" Newtonian on an alt-azimuth Dobsonian-style mount. Newtonian telescopes. A complete description of their optical capabilities. Both the mirror and the diagonal are examined. Newtonian aberrations. Diagrams and formulas help to understand the shape and character of the blurs for each type of aberration found in the common Newtonian telescope. Vignetting. How to determine the size of diagonals, draw tubes, and dew caps in Newtonian telescopes. A "twitcher" telescope. A folding Dall-Kirkham 3" telescope is small enough to fit into an inside coat pocket. Construction of a 12" reflector with a run-off observatory is described. Table gives the correct size for diagonals in various size telescopes. An ultra-portable 6-inch reflector. A simple mirror box doubles as storage for the focus board. Four wooden struts support the focus board in use. The scope mounts on a camera tripod. The "ultimate" Newtonian. How to fine tune a Newtonian reflector to produce the best possible images. Equatorial split-ring telescope features open-tube design. Constructed mostly of plywood. Building a 14" ball-in-socket Newtonian telescope. The lower assembly of this open-tube reflector consists of a 24" diameter sphere which rests on a simple base and allows the telescope to be easily pointed in any direction. A new wide-field all-spherical telescope. Includes design parameters for a 10" clear aperture. Tips on grinding and polishing the mirror and lenses, null testing the corrector, etc. Optical specifications for the Schalck-Newtonian with a 12.5" spherical mirror. Designing a Yolo telescope, an unobstructed wide-field reflector used mainly for observing the Moon, planets and double stars. Design uses standard 6" and 4.25" Pyrex blanks for the primary and secondary mirrors. Building a high-performance Newtonian reflector using a 4.25" f/10 mirror, 0.5" diagonal, and a 5" optical window. The tube is a simple plywood box assembled with nuts and bolts. Building a 6" unobstructed Yolo-Newtonian. Novel optical design consists of just two elements. Supertune your telescope for the very best performance. Some tips. Building a 14.5" f/6 yoke-mounted reflector for a hinged-roof observatory. Includes construction information for the 16" x 8-ft tube, yoke mounting, piers, and observatory. A split-ring 12.5" f/6 Newtonian for 9-degrees latitude. Drawings illustrate the construction of the wooden equatorial mounting, open tube and clock drive assembly. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
|||||||||