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Ingyenes szállítás 10.000 Ft felett

 
by richard tresch fienberg ^ 1 Good Stuff Cheap You can get a surprisingly good telescope for surprisingly little money this holiday season. THE HOLIDAYS ARE APPROACHING AGAIN, and telescope dealers are gearing up for their busy season. While a serious amateur astronomer is as likely to buy...
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by richard tresch fienberg ^ 1 Good Stuff Cheap You can get a surprisingly good telescope for surprisingly little money this holiday season. THE HOLIDAYS ARE APPROACHING AGAIN, and telescope dealers are gearing up for their busy season. While a serious amateur astronomer is as likely to buy a new telescope in June as in December, the vast majority of instruments sold each year — those bought as gifts for beginners or kids — fly off the shelves in the month or two before Christmas. Sadly, many of them are to put it deUcately junk. You know these scopes. They're the 2.4-inch (60-millimeter) refractors and 3-inch reflectors sold in department stores under signs proclaiming "525 power!" They come with rickety tripods, finders that should really be called losers, eyepieces that you have to screw into yotu: eye socket to look through, and Barlow lenses that push them to such absurdly high magnifications that all you see is a blur. The late George Lovi, a longtime Sfey Telescope columnist, derided these instruments as "hohday trash-scopes." Rather than nurture a lifelong Interest in astronomy, they frustrate their users and end up in a closet or attic, never to see starlight again. Many department stores still promote holiday trash-scopes with come-ons touting impracfically high powers, but if you shop carefully, you can find quahty starter scopes at surprisingly affordable prices. It's that "if you shop carefully" that's the problem — most telescopes, especially those given as gifts, are bought on impulse m response to a flashy in-store display. Their buyers, however well intentioned, haven't taken the time to leam what to look for when choosing a telescope. That's where experienced amateur astronomers (that Is, readers of ST) come in. We're the ones other people turn to for advice about how and where to buy a telescope. I used to try to steer friends and acquain- tances away from purchasing a scope unless they were willing to spend $500 or more. Most of them weren't, so I recommended they get binoculars instead. But nowadays you can get a decent scope well suited to a child or an adult begiimer for less than $200. In the course of preparmg our annual telescope buyer's guide, which appears in ShyWatch '05 (available on newsstands and at SkyandTelescope.com/skywatch), we found three 3- to 4V2-inch reflectors priced from $99 to $199 that we can recommend without hesitation and one 60-nim refractor that will do in a pinch for those on a more restricted budget. My hat's off to the folks at Orion Telescopes & Binoculars and Celestron for taking the trouble to manufacture products that avoid most of the pitfalls of hohday trash-scopes and give newcomers a chance to get the hang of using a telescope at very low cost. (If you encourage someone to consider any of these scopes, make sure you point out that they're generally not available in department stores but only at specialty dealerships such as the ones that advertise in this magazine.) Of course, some who are looking to get a telescope — especially one for themselves — are wiUing to spend many hundreds or even thousands of dollars, and today's astronomical marketplace gives them plenty of choices. We list prices and specifications for 230 telescopes from 30 manufacturers m SkyWatch '05. Some are no-frUls models that give you the most celestial bang for your buck, and others come with computers and other "bells and whistles" that make backyard astronomy as high tech as it is fun. Warning: Here comes another shameless commercial plug. If you buy a telescope as a gift for someone tliis hohday season, or if you advise someone else on a telescope purchase, don't forget about Nigh Sky, otu new bimonthly magazine for beginning stargazers (Match issue, page 8; see also NightSkyMag.com). It'll help any new telescope user get off to a great start, and at just $17.99 for an annual subscription (a bit more outside the US), it too is good stuff cheap.
Termékadatok
Cím: Sky & Telescope December 2004 [antikvár]
Szerző: Charles A. Wood , Fred Schaaf , Gary Seronik Greg Bryant
Kiadó: Sky Publishing Corporation
Kötés: Ragasztott papírkötés
Méret: 220 mm x 280 mm
Charles A. Wood művei
Fred Schaaf művei
Gary Seronik művei
Greg Bryant művei
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