Making Telescope Mirrors
Monday, July 18th, 2011
Why is a mirror in a telescope made from glass?
Mirrors for telescopes are always made of glass with a thin layer of aluminium or silver so light will never pass through.
Why not make them of solid aluminium: It is lighter and more stable with temperature variations.
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Orion StarBlast 4.5 EQ Reflector – Telescope – f/4.0 – reflector $199.99 Considering how many adults have told us they love our StarBlast “mini Dob,” we weren’t surprised that some of them suggested we offer the StarBlast optical tube on a full-size telescope mount. Sounded like a good idea to us. So here it is, the StarBlast 4.5 EQ. It’s bound to become a favorite of both adults and adolescents alike. It combines the much-heralded StarBlast wide-field (f/4.0) paraboli… |
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Cstar DM-5 Periscope with Shatter-Proof Mirrors and Wide Angle Field of View (Green) $24.99 This easy-to-use Cstar® periscope is made of lightweight, durable plastic and includes shatterproof mirrors and big handles for small hands. It’s a great educational tool and is fun for kids and adults. Appropriate for use by children from ages 4 and up…. |
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Orion 8 f/8 Ritchey-Chretien Astrograph Telescope $1,195.99 The Orion 8″ Ritchey-Chretien Astrograph’s outstanding optical design lets you capture spectacular, detailed images of deep-sky objects like never before. Unlike conventional Newtonian reflector and Schmidt-Cassegrain designs that are susceptible to coma away from the center of the field, the Ritchey-Chretien utilizes hyperbolic primary and secondary mirrors, made of BK-7 optical glass, to achieve… |
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Toysmith Kaleidoscope Making Kit TS3435 $8.29 Build a 10″ kaleidescope with our kit that included everything you need to decorate and customize you very own kaleidescope. Ages 5 and up. Made in China…. |
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Celestron NexStar 130 SLT Reflector Telescope $471.60 NexStar 130 SLT Reflector Telescope (Celestron) – View the details of the lunar surface, the rings of Saturn, the polar ice caps on Mars, the cloud belts on Jupiter or a number of the Messier objects using the additional light-gathering capabilities of the 5″ primary mirror. The 130 SLT comes with a fully computerized, ergonomically-designed hand control that gives you the ability to automatically… |
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Burgundy Baytronix AstroQuest 6 Short Tube Reflector Telescope EQ Mount $295.00 Short Tube 6 Inch Newtonian Reflector Telescope. This is large aperture reflector at the bargain price that makes your introduction to serious high-power viewing affordable. This 6 inch reflector scope boasts a “short tube” design, with a built-in corrector that yields an 1400mm focal length with just a 19 inch primary tube. As a result, this scope packs a serious high-power punch, with magnif… |
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How to Make a Telescope ( Second English Edition) $24.95 The first edition of this book was universally acclaimed as the best book ever written for making a Newtonian telescope. This 2nd Edition is almost three times larger and adds to the original text new chapters on making a Cassegrainian telescope, optical windows, and equatorial mounts. Chapters on eyepieces and astronomical seeing have been expanded. Computer programs written in generic BASIC for … |
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Understanding Foucault $7.80 David A. Harbour presents a brilliant narrative for the Amateur Telescope Maker (ATM), on exactly how the “Foucault Test” is interpreted. Through a series of “foundation lessons” Mr. Harbour ensures the ATM understands what the Foucault Test is revealing, and what to do about it as he figures the telescope mirror to achieve the perfect paraboloid. Imagine if the makers of the Hubble Space Telescop… |
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Mirror Mirror: A History of the Human Love Affair with Reflection $4.18 Of all human inventions, the mirror is perhaps the one most closely connected to our own consciousness. As our first technology for contemplation of the self, the mirror is arguably as important an invention as the wheel. Mirror Mirror is the fascinating story of the mirror’s invention, refinement, and use in an astonishing range of human activities–from the fantastic mirrored rooms that wealthy … |
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Nikon 8291 16-48x65mm EDG Angled Body Fieldscope with Eyepiece $2,699.95 NIKON EDG Fieldscope 65mm Angled w/16-48x Zoom Eyepiece (8291)… |
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Amateur Telescope Making in the Internet Age: Finding Parts, Getting Help, and More $38.94 Building an astronomical telescope offers the amateur astronomer an exciting challenge, with the possibility of ending up with a far bigger and better telescope than could have been afforded otherwise. In the past, the starting point has always been the grinding and polishing of at least the primary mirror, a difficult and immensely time-consuming process. But now that the Internet has brought us together in a global village, purchasing off-the-shelf goods such as parabolic mirrors, eyepieces, lenses, and telescope tubes, is possible. There are also a vast number of used mirrors and lenses out there, and it is now possible to track them down almost anywhere in the world. Online stores and auction houses have facilitated commerce regarding all sorts of useful optical components at a reasonable price. This is a book about making telescopes from available parts. It provides guidance on where to look and what to look for in selecting items useful for telescope making and explains how to assemble these components to produce an excellent instrument on a tight budget. At one time, many amateurs made their own telescopes from home-made parts. In today’s rushed world, that has almost become a lost art. The Internet offers a wonderful alternative to either buying a pricey scope fully assembled or making your own from scratch. |
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Mirrors $9.76 Rated: RSynopsis: Synopsis: Emmy® and Golden Globe® winner Kiefer Sutherland comes face to face with the ultimate forces of evil in Mirrors, the deadliest horror film to ever look you in the face. Kiefer stars as a security guard who is exposed to unspeakable acts of evil from the past, present and future only visible to him in the reflection of mirrors. Suddenly, his life is exposed to the evil and he must stop it before everyone he knows is dead.Bonus Features: **Theatrical Version**Unrated Version**Deleted Scenes with Optional Commentary by Director Alex Aja:*SCENE 7A: It’s a Job*SCENE 9B: Snappy Uniforms*SCENE 11: See You in the Morning*SCENE 25: I Never Come Down Here*SCENE 54: Michael has a New Friend*SCENE 109: You Will Know When*SCENE 120 – 124: The Ambulance*Alternate Ending: Inside the Mirror**Vignette/Documentary/Featurette:*Reflections: The Making of Mirrors*Mythology of Mirrors: Behind the MirrorSpecifications: Audio: English, French & Spanish: 5.1 Dolby DigitalLanguage: Dubbed: English, French & Spanish / Subtitled: English & SpanishAspect Ratio: Widescreen 2.40:1Box Office: $30,000,000.00 |
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Telescope $5.99 Telescope |
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Making Your Own Telescope $16.79 Complete, detailed instructions and numerous diagrams for constructing a do-it-yourself telescope. No complicated mathematics are involved, and no prior knowledge of optics or astronomy is needed to follow the text’s step-by-step directions. Contents cover, among other topics, materials and equipment; tube parts and alignment; eyepieces, and related problems; setting circles; and optical principles. 1973 ed. Appendixes. Index. 6 plates. 100 figures. |
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Amateur Telescope Making $16 Many amateur astronomers make their own instruments, either because of financial considerations or because they are just interested. Amateur Telescope Making offers a variety of designs for telescopes, mounts and drives which are suitable for the home-constructor. The designs range from simple to advanced, but all are within the range of a moderately well-equipped home workshop. The book not only tells the reader what he can construct, but also what it is sensible to construct given what time is available commercially. Thus each chapter begins with reasons for undertaking the project, then looks at theoretical consideration before finishing with practical instructions and advice. An indication is given as to the skills required for the various projects. Appendices list reputable sources of (mail order) materials and components. The telescopes and mounts range from "shoestring" (very cheap) instruments to specialist devices that are unavailable commercially. |
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Making Mirrors $14.99 Republic:001644902 |
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Stargazing with a Telescope $3.95 "Revised and updated." Buying a telescope is crucial for enhancing interest in astronomy. With so many choices, how does the beginner choose? Robin Scagell supplies the expert objective advice to making a smart purchase. Stargazing With a Telescope is a practical guide that demystifies the process of buying a telescope. The features and benefits of the different types of viewing instruments are evaluated in straightforward terms. The color illustrations help to clarify the choices. Equipment covered includes: Binoculars: a range of choices for astronomers at any level Refractors: classic telescopes that are easy to use and maintain Reflectors: sophisticated instruments that allow night sky photography Catadioptrics: compact telescopes that are gaining popularity. The book provides brand names and model numbers and the general advice applies to all brands, not just those covered. Lens size, focal lengths, focal ratios and much more is explained with clear diagrams and non-scientific text. Also covered are suitable accessories such as eyepieces, filters, mounts and supports, and suggestions for photography through the telescope, and choice of camera and film types. Useful tips are provided on setting up and using any telescope as well as a review of objects to look at with different sizes of telescope. There is also valuable advice on how to instantly spot misleading labels on low-end telescopes. These are often bought for young, aspiring astronomers who quickly become discouraged with the telescope’s poor performance. Stargazing With a Telescope is a must for newcomers to astronomy whatever their age. |
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Standard Handbook for Telescope Making $19.64 This book is in Good Used condition |
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Orion 8 f/3.9 Newtonian Astrograph Reflector Telescope $479.99 Our 8″aperture deep-sky imaging specialist boasts features usually reserved for much pricier astrophotography telescopes. In fact, the Orion 8″ f/3.9 Newtonian Astrograph’s powerful imaging performance easily exceeds what’s achievable with many premium apo refractors costing thousands of dollars more. Its 8″ parabolic primary mirror has 800mm of focal length, making the fast f/3.9 Newtonian an ideal wide-field astrophotography telescope. A substantial 70mm minor axis secondary mirror provides full field illumination to CCD and/or DSLR cameras for efficient astrophotography performance. This provides less than 10% light drop-off around the corners of very large APS-C sized sensors. Both primary and secondary mirrors boast enhanced reflectivity (94%) aluminum coatings with a protective silicon dioxide (quartz) overcoat. Three easy-grip, push-pull collimation hand knobs on the primary cell make collimation adjustments easy. Once aligned, three locking thumbscrews secure the 8″ parabolic mirror. Images acquired with the 8″ f/3.9 Newtonian Astrograph will exhibit maximum contrast thanks to sophisticated telescope features any astrophotographer will appreciate. Nine precisely positioned baffle rings along the inside of the reflector optical tube minimize internal reflections of pesky off-axis light for pristine imaging performance. To further optimize contrast and avoid off-axis light intrusion near the front of the telescope, the dual-speed 2″ Crayford focuser has been installed a full 6.3″ back from the front of the 30″ long reflector optical tube. |
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Making Decorative Mirrors & Shelves $1.89 This book is in New – Excellent condition |
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Amateur Telescope Making (Edition. Edition) $87.54 Tonkin provides an introduction to the design of a variety of telescopes, mounts, and drives suitable for the homeconstructor. Projects include instruments that range from a shoestring budget to specialist devices that are not commercially available. The skill level of each project is indicated and advice is provided as to what is sensible to construct, given what is commercially available. Hints and tips are included, as well as listings of reputable mail order sources of materials and components. 70 illus. Author: Tonkin, Stephen/ Tonkin, Stephen Series Title: Practical Astronomy Binding Type: Paperback Number of Pages: 272 Publication Date: 1998/12/11 Language: English Dimensions: 9.20 x 6.12 x 0.56 inches |
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Free Shipping. AIM Telescope $64.99 The AIM refractor type telescope is rugged, trouble free and easy to operate, making it perfect for the beginning observer. The telescope features a focal length of 350mm, a power range of 20x-80x and an adjustable table top tripod for steady viewing. Includes case, 2x Barlow lens, three Kellner eyepieces and table-top tripod. Focal Length: 350mm Objective Lens Diameter: 50 mm Accessories: Lens Caps, 3-Eyepieces, and Tripod This item ships directly from the manufacturer. Product usually arrives in 14-21 business days, depending on destination, including order processing and shipping. APO/FPO shipping unavailable |
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Humvee HMVBTELESCOPE 12×25 Telescope $40.5 The Humvee 12 x 25 Black Collapsible Monocular is the perfect item for sporting events family outings etc. It is a very convenient item to have around if you are looking for a great viewing device that doesn t require a lot of space to carry around. Built Humvee Tough the telescope features a rubberized coating making it easy to grip. 12 x 25 Telescope Rubber Armor Ruby Lens. They are built with quality anti reflective light gathering ruby glass lenses. Comes with a carrying case. 100 genuine brand names. |
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Smoke & Mirrors $13.99 “>>Introducing “Smoke & Mirrors”, Lifehouse’s fifth studio album and follow up to “Who We Are”, released in 2007. Lead singer / guitarist Jason Wade, drummer Rick Woolstenhulme, bassist Bryce Soderberg and newly added guitarist Ben Carey, along with long time producer Jude Cole, have created a set that combines their live sound with great record making. With tens of millions of radio spins garnered over the span of 4 albums, >Lifehouse>> >>>is no stranger to success and great record making. >> >>“Smoke & Mirrors”>> >>>>started out with a mission to capture the live, rock side of the band; a sound they had perfected after three years of solid touring. “>Smoke & Mirrors”>> >>>properly defines the best that >Lifehouse>> >>>has to offer, showcasing a rocking band full of new hit records for >Lifehouse>> >>>fans new and old! >>” |
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Hall Of Mirrors $7.37 Following his bestselling biography of the Pound Sterling, David Sinclair’s next book is a fascinating insight into the single event which shaped the face of the modern world. If the Great War of 1914-1918 was a tragedy, then the Treaty of Versailles was a complete travesty. Rather than sealing a guarantee for peace, stability and prosperity for a new and better world, the treaty ensured that the remainder of the twentieth century would see horror, brutality and suffering unparalleled in human history. The treaty was engineered and manipulated by self-interested politicians with individual motivations and contrasting agendas. Hall of Mirrors reflects on how the representatives of America, Britain and France – Woodrow Wilson, David Lloyd George and Georges Clemenceau – deliberately ignored the possibility of finding a progressive international solution. Instead, driven by ego and personal vendetta, these statesmen stimulated a European future of faction, dispute and conflict. Hall of Mirrors is a fascinating story of destruction, delusion and greed, illuminating the personalities and politics involved in making the treaty. It is also a valuable and topical discussion on the political structures which enable individual character and will to dictate the course of history and culture. |