61. OPT - Astronomy Telescopes, Accessories, CCD And Digital Cameras Astronomy telescopes from Meade, Celestron, Tele Vue, Takahashi, Accessories and eyepieces, CCD Imaging cameras from SBIG. http://www.optcorp.com/

OPT Headlines Check out the latest deals and product announcements Listen to OPT's exclusive interviews from RTMC, 2004! The NEW MEADE LXD75 SERIES ... Need help choosing or using a CCD camera? Featured Products Meade ETX-125AT - UHTC w/Free Saturn Kit Our Price $1,090.00 Takahashi Sky 90 II NSV Fluorite APO OTA Our Price $1,849.00 Store Info FAQ Contact Us Links ... Return Policy Site development by LynchInteractive Info about optcorp.com Oceanside Photo and Telescope is the premiere online telescope retailer of Meade telescopes, Celestron telescopes, Takahashi telescopes, Televue telescopes, Discovery telescopes

62. Anacortes Telescope & Wild Bird Meade announces LXD75s with heavyduty EQ mounts Meade has announced a new LXD75 Series of equatorially mounted telescopes available with or without Meade s http://www.buytelescopes.com/

Shopping Cart Wish List My Account Help Search Search all of ATWB Astronomy Sport Optics Books Wild Bird Supply Classifieds Manufacturers What's New Top Sellers Gallery ... log in here. Browse Astronomy Sport Optics Books Wild Bird Supply ... Classifieds Orders: Info: Fax: Email: info@buytelescopes.com Image of the Day ‚j‚‰‚Ž‚‡‚†‚‰‚“‚ˆ‚ ‚’ By: ikuo takamura View the Customer Gallery We had a GREAT time at RTMC this year! Sunny skies and top-notch technology greeted visitors to this year’s RTMC Astronomy Expo. If you missed out, don’t despair – we’ve got a full photo tour for you. News Visa and MasterCard welcome for international orders! As part of our ongoing efforts to make your shopping convenient and secure, we're now a participating merchant in the Verified by Visa and MasterCard SecureCode Meade announces LXD75s with heavy-duty EQ mounts Meade has announced a new LXD75 Series of equatorially mounted telescopes available with or without Meade's Autostar suite and computer controls. The LXD75s includes Schmidt-Newtonians, Schmidt-Cassegrains, achromatic refractors and a single Newtonian model. The new telescopes feature a high-performance equatorial mount, heavy-duty, all-metal field tripod and precision drive system. Volume shipments are expected to commence in July. Start reading Ron Wodaski's new book now!

63. Woodland Hills Camera & Telescopes - TOLL-FREE 1-888-427-8766 Large selection of binoculars, cameras, telescopes and accessories made by Meade, Celestron, TeleVue and other manufacturers. http://telescopes.net

ORDER TOLL FREE: Serving You for Over 50 Years !! Bushnell Canon Celestron Coronado Fujinon JMI Kendrick Leica Losmandy ... CLICK HERE FOR MORE INFO!! EXPERIENCED HELP WANTED - CALL 818-347-2270 SPECIAL OFFER!! ACCESSORIES!! TELESTAR DS 2130AT ... REFURBISHED Compare at $400.00 NEW! ETX-70AT with #882 Standard Field Tripod REFURBISHED ONLY HURRY!! LIMITED STOCK HURRY GOING FAST !! Firstscope 114EQ ONLY ( 2 )AVAILABLE! 10" LX-50 IMAGE STABILIZER BINOCULARS Mail-In REBATES NexStar FREE Starter Kit Order NOW! LXD75 Series LXD75 N-EC LXD75 SN-EC LXD75 SN-EC UHTC LXD75 SN-6AT ... LXD75 AR-6AT Starts Shipping End of June 2004 NOW AVAILABLE Meade Sky Assurance Meade's NEW 3 year and 5 year Extended Service Plans ORDER NOW!! STARHOPPER Dobsonians Return Policy CLOSED - Sundays We Have Been In The Same Location to Serve You for Over 50 Years 5348 Topanga Canyon Blvd, Woodland Hills, CA 91364 Phone (818) 347-2270 / Fax ( 818) 992-4486 Or TOLL-FREE at (888) 427-8766 Will only honor current page prices!

64. Equatorial Platform - Reagan's Dob Tracker Information about stepper driven platform for dobsonian telescopes. Shows construction ideas and links to build a basic platform. http://www.geocities.com/reaganjj

Equatorial Platform - Reagan's Dob Tracker The best of both worlds - a Dobsonian mount with the ability to track the Earth's rotation. The equatorial platform moves with the earth's rotation for up to one hour, then it needs to be rewound. The eyepiece is always in an easy location for viewing and very accurate tracking is possible. DC motor linear drive screw (left) equatorial platform controlled by an H.O. Train power pack - very close to the design of Warren Peters (see below). My latest equatorial plarform (lower left) has a north cylindrical bearing and an axial south bearing. It is driven by a rollerblade wheel that contacts the north runner directly. It is powered by a stepper motor that turns a 10:1 reduction gear that is controlled by a microstepping controller. A second stepper is used to make small corrections for errors in polar alignment and uses a ballscrew that has 3/4" of travel. The second axis is driven by a standard stepper controller. The scope (100 lbs of load) sits flat north to south and rotates 15-degrees east to west. It can fast forward, fast rewind, fast correct, and slow correct (see drawing of indexer / hand controller). A second hand controller is used for the second axis. This equatorial platform puts an axial bearing through the center of Warren Peters' south cylindrical bearing (see Warren's link below). Details - Stepper Driven Platform with active design sheet for Warren Peters'directions (manual.html on the eqplatforms site - link below.

65. Telescopes Types Refractors Achromatic Apochromatic Reflectors telescopes information types refractors reflectors achromatic apochromatic, Dobsonian, making, services, based in Adelaide, sales throughout Australia, New http://www.telescopes-astronomy.com.au/telescopes003.htm

TELESCOPES TELESCOPE GLOSSARY 2 Basic Types REFRACTORS These are the most popular telescope for beginners. They use a lens to gather and focus the light of the object it's pointing at. Using a lens which is made from two elements or more, the refractor reduces false colours. FRONT PAGE There are two different types - the achromatic or apochromatic. CONTENTS Basic features of refractors include: PROS; small and compact maintenance free high resolution (excellent planet scopes) Can be used during the day for terrestrial viewing without the image being upside down CONS; expensive for larger models and apochromatic less light gathering power than reflecting telescopes because of their smaller size Awkward to use when pointing straight up (straight up is the best place to view with a telescope) false colour especially in larger models TELESCOPE LINKS: Mounts Light Gathering Power Closer Look At Refractors Closer Look At Reflectors ... Tips REFLECTORS Astrophotography Build your own telescope Reflectors gather light using a mirror which is curved. The curved mirror concentrates the light and is then magnified by an eyepiece. Newtonian reflectors (invented by Sir Issac Newton) can be identified by the eyepiece protruding from the side of the telescope. These are the most common and cheapest to buy. Other types of reflectors incorporate a front lens which corrects the incoming light first before hitting the main reflective mirror. These front lenses are called corrector plates and the different types used determine the type of reflecting telescope. The more popular types are the

66. Mapug.com Homepage Resources for Meade owners, including LX200, LX50, and StarFinder telescopes and Pictor CCD cameras. http://www.mapug.com/

Last Update: 4/19/2004 Random image selected above, most are linked to author's home website. bCentralFastCounter Search Topical Archive

67. Camera House Photographic retail chain in Australia with more than 110 Locations. We stock a range of cameras, film, telescopes, and binoculars. http://www.camerahouse.com.au/

68. Stargazer Steve Telescopes Order Info Prices. Getting Started in Astronomy Article for Beginners. Why Reflecting telescopes? Links. REFLECTING telescopes THAT GIVE MORE SKY FOR LESS FROM. http://stargazer.isys.ca/

6-Inch Truss Tube Scope 10-Inch Truss Tube Scope Sgr-4 6" Deluxe Reflector Kit ... Read SkyNews Review of the Deluxe Kit! Site Designed by Please report problems with this page to the Webmaster Universe Today - Space news from around the Internet, updated every weekday. REFLECTING TELESCOPES THAT GIVE MORE SKY FOR LESS FROM NEW!: EACH STARGAZER STEVE TELESCOPE OR KIT NOW INCLUDES A FREE RIGEL QuikFinder. 6-Inch f/5 Truss Tube Telescope. Easy-in/Out Black Shroud comes with every Truss Tube scope. Click Here! For information about the new 10-inch f/5 Truss Tube Scope, Click Here! The Ready-to-use Sgr-4 (below) This 4 1/4-inch Reflecting Telescope comes complete with a rock steady natural-finish hardwood mount. "Objects were surprisingly bright and clear in these small aperture scopes. The instruments are perfect for wide-field buffs" "The Stargazer was set up the second I spread its tripod legs. This tripod demonstrates how rigid yet lightweight a good design can be." "...The Stargazer [Sgr-3], with a significantly darker background, allowed me to see more detail [in the Andromeda Galaxy]."

69. South African Astronomical Observatory - Home Page An introduction to the SAAO, a description of instrumentation and telescopes, an observation schedule, and information on educational opportunities. http://www.saao.ac.za/

Home News SAAO in brief SALT ... Links Search: Transit of Venus: 8 June 2004 On 8 June, skywatchers in Africa, Europe, Asia, Australia and parts of the Americas will see the first transit of Venus since 1882. Transit of Venus Contact Times Images from SAAO, Cape Town Webcast of the Transit of Venus from Mossel Bay, South Africa Vacancies ... Two Dim Comets Visible - How to Spot Them Two comets are visible to the naked eye this month, but neither one is easy to find unless you know exactly where to look. COSPAR/IAU Regional Workshop for African Astronomers and Space Scientists An Advanced School for Multi-wavelength Astrophysics to be held in Durban, South Africa, from 28 June to 9 July, 2004 Viewing the Sky in June 2004 South African Astronomical Observatory P.O. Box 9, Observatory, 7935, South Africa Phone: +27 (0)21 447-0025 Fax: +27 (0)21 447-3639 enquiries@saao.ac.za http://www.saao.ac.za Dated: 10 June 2004

70. Danish Telescopes Danish telescopes. This service gives links to pages describing Danish telescopes currently in use. Click on Instrument Centre. telescopes http://www.astro.ku.dk/~michael/dantel.html

Danish Telescopes This service gives links to pages describing Danish telescopes currently in use. Click on the iconized images to see the bigger versions and click on the text to move to the info-pages. Any questions/suggestions are welcome at: michael@astro.ku.dk . For more information about Danish telescope and instrument development see the pages of the Astronomical Instrument Centre Telescopes: The Nordic Optical Telescope (NOT) The Danish 1.54 m Telescope The Carlsberg Meridian Telescope Telescopes at the The Brorfelde Schmidt Telescope Telescopes at the Brorfelde Observatory Student operated facilities: The New Student Telescope (NeST) The Boserup Amatuer Observatory (BAO) Last update: September 24th, 1999 by MYKAL

71. Computer Operated Telescopes Features plans and designs for stepper or servo motor layouts as well as features, free software, and howto information. Links to pictures of other amateur computerized newtonians included. http://www.bbastrodesigns.com/cot/cot.html#CONTENTS

Computer Operated Telescopes by Mel Bartels for sale: stepper and servo systems news amateurs' COTs table of contents ... contact Mel While software can reside on a microcontroller, it is my style to execute it on a laptop, allowing the hardware to be simple and flexible. In addition, a laptop has sufficient computing power and a full bodied user interface, so that adequate attention may be given to precise tracking (sub arcsecond over many minutes), precise goto (35 arcsecond rms from horizon to horizon), and all encompasing error correcting routines. My software also tends towards straightforward text interfaces, as complex graphical environments are hard to operate in the dark and injurious to night vision. Finally, the ease of developing software and getting bug fixes and enhancements out to users the next evening should not be underestimated for laptop and PC platforms. stepper system servo system Advantages 1. low cost 2. instantly responsive motors Advantages 1. can use any operating system that supports a serial link 2. larger motor dynamic range means faster slews

72. Telescopes At The Brorfelde Observatory telescopes at the Brorfelde Observatory. Brorfelde is located on a hilltop in the central part of Sealand about 15 km south of the town of Holbæk. http://www.astro.ku.dk/~michael/telescope/bror.html

Telescopes at the Brorfelde Observatory Copenhagen University Observatory (CUO) with a number of telescopes, a mechanical workshop building telescopes and instruments and half a dozen of CUOs scientists working here on a daily basis. Now all scientists, ingeneers and technical staff have moved to Copenhagen to the Rockefeller Complex but the University of Copenhagen is still administrating the facility and the telescopes will - for now - remain at Brorfelde. There are presently four operational telescopes at Brorfelde: The Brorfelde Schmidt Telescope (dome to the upper left), two Cassegrain focus reflectors with 0.40 m (dome to the lower left) and 0.25 m (dome near the center) aperture and an old transit circle (dome to the lower right). The Schmidt telescope was for many years operated as a normal Schmidt camera obtaining high quality images of 5 degree sky patches. The images obtained were used for many purposes e.g. discovery of asteroids and determination of their orbits. Some years ago the Schmidt telescope was equipped with a CCD-camera and auto-guiding equipment and is now used for many different purposes e.g. supernova search in galaxies. The 0.40 m reflector has been used for extensive ubvy beta photometry of a large number of stars and the 0.25 m reflector has for the last couple years mainly been used by students and amatuer astronomers to obtain lightcurves for variable stars by means of broad-band photometry (Johnson UBV). The old transit circle replaced the Carlsberg Meridian Telescope when this was moved to the Canary Islands in the mid-80'ies. The presently installed transit circle is mainly used for testing equipment.

73. Antique Telescopes, Spyglasses, Archaeoastronomy. An overview with photographs of many lesser known telescopes typical of their time. http://www.antiquetelescopes.org/

NEW! Captain James Cook's Telescopes Topics on this site include: Cincinnati astronomy, antique telescopes, historical telescopes, antique scientific instruments, reflector telescope, refractor telescope, spyglass, pirate telescope, telescope history, history of astronomy, astronomy before the telescope. Topics to be added shortly: History of the Cincinnati telescopes and observatory, Captain Cook's telescopes, and many more photographs of old instruments. Rather than show all the well-known historical instruments in important museums (since these photos are readily available elsewhere), I prefer to show little-known astronomical instruments that are nonetheless typical of their time. I make no claims for completeness. This site is intended as an overview of historical astronomical instruments. As more material is added in the months ahead, the site will naturally become more comprehensive. Introduction Before the Telescope 17th Century Telescopes 18th Century Telescopes ... Captain Cook's Telescopes

74. Radio Telescopes Radio telescopes. Most of what we telescopes observing at these wavelengths are commonly called radio telescopes. Although they do not http://csep10.phys.utk.edu/astr162/lect/light/radio.html

Radio Telescopes Most of what we know about the Universe comes from information that has been carried to us by light. But we have seen that visible light is only a small part of the electromagnetic spectrum. In recent years the remainder of the electromagnetic spectrum has revealed extensive information about our Universe. NRAO 140 Foot Telescope The first non-visual spectral region that was used extensively for astronomical observations was the radio frequency band. Telescopes observing at these wavelengths are commonly called radio telescopes . Although they do not look like optical telescopes, radio telescopes are built to accomplish the same gathering and focussing tasks on radio frequency radiation that reflecting telescopes perform on visual frequency light. The adjacent image shows the 140 foot antenna of the National Radio Astronomy Observatory in Green Bank, West Virginia. Radio telescopes are used for many purposes, but let us describe two here explicitly: the mapping of neutral hydrogen concentrations using the 21 centimeter spin-flip transition in hydrogen, and the use of multiple radio telescopes operated as if they were a single telescope of very high resolution. Mapping Neutral Hydrogen A neutral hydrogen atom (H I) consists of 1 proton and 1 electron. The proton and electron spin like tops with their spin axes either parallel or anti-parallel. When hydrogen atoms switch from the parallel to the anti-parallel configuration they emit radio waves with a wavelength of 21 centimeters and a corresponding frequency of exactly 1420 MHz. This is called the

75. Antique Microscopes, Globes, And Telescopes - ARSmachina Buys and sells antique brass microscopes and telescopes. Credit Cards accepted. http://arsmachina.com

antique microscopes,antique telescopes,globes,compasses,dials scientific instruments arsmachina.com microscopes telescopes the fine art of science sporting collectibles ... dials tom grill var site="sm2ars"

76. Guide To Telescopes For The Beginner The number one rule about buying telescopes Don't buy from a department store! Want some more information? http://www.geocities.com/CapeCanaveral/Launchpad/4515/telebeginnger.html

Telescopes for the Beginner Courtesy Meade Before You Buy You've Decided to Buy Getting the Basics Types of Telescopes ... Astronomy Magazine Telescope reviews. Don't forget to stop in at the places who make the telescopes! Meade Instruments Corporation Celestron If the information you dig up leaves you feeling more confused, think about joining a local astronomy club. Some are free, others have a low annual membership fee. You will meet many other people at the meetings who already have telescopes. They can give you advice and give you ideas of costs, portability, and dealers in close surrounding areas. Almost every club hosts star parties in which members who have telescopes bring them along. This gives you a chance to look through a variety of different scopes. It also lets you see what kind of size you are willing to tote around. It allows you to interact with other people who have the same interest. This is a fantastic way to make new friends. I've heard of a few clubs that rent telescopes to their members for a nightly charge. I have no idea how much, but it would be worth looking into. Beginning of Page You've Decided to Buy First, get familiar with the sky. Can you find the Andromeda galaxy? What kinds of nebulas are there in the different constellations? It is best to buy a book that includes descriptions and star charts for the beginner. Also, subscribe to a popular astronomy magazine. Most of them are aimed directly at the back yard observer.

77. Telescopes Direct Sells telescopes, binoculars and accessories. Site features information and advice on choosing telescopes http://www.telescopes-direct.com/

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78. Starstuff Astronomy Resource site for amateur astronomers with telescopes, observing aids, and links. http://www.starstuff.com/

Starstuff is a live, interactive guide to the night sky. From this site, you will learn about amazing celestial wonders that are in the sky right now, how to find them, and how best to view them. From our vantage point in the Pacific Northwest, the view of the heavens is often obscured. Starstuff will take you beyond the clouds. Begin your exploration now. Become a Starstuff Sponsor! Contact Starstuff Credits ITS 2004

79. Lomo PLC Home Offers telescopes, microscopes, endoscopes, cameras, night vision equipment, and special aerospace and military equipment. http://www.lomoplc.com/index2.html

This page uses frames, but your browser does not support them. Please use a newer browser. For US Distributor of LOMO PLC products , please see LOMOAmerica.com For LOMO Consumer Products see http://www.OpticsPlanet.com OpticsPlanet.com online store - complete line of LOMO PLC microscopes Night Vision telescopes spotting scopes , and 35mm film cameras and other fine optics products: LOMO Microscopes and microscope accessories LOMO Telescopes and telescope accessories LOMO Monoculars, spotting Scopes and spotting scope accessories LOMO Night Vision goggles, scopes and monoculars ... LOMO 35mm LC-A film cameras and camera accessories

80. Telescopes Contents telescopes. Introduction; Types of telescopes Definition of telescope and the two types of telescopes. Refractor telescopes. http://www.astronomynotes.com/telescop/chindex.htm

Contents - Telescopes Introduction Types of telescopes Definition of telescope and the two types of telescopes. Refractor Telescopes. Advantages and disadvantages. Advantages Disadvantages Reflector Telescopes. ... Astronomy Notes home

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