By Neil English
Classic telescopes are of curiosity to novice astronomers for a number of purposes. There are the committed creditors, yet there also are many amateurs who love the nostalgia they encourage. those telescopes "feel" assorted from any modern telescope and maybe have a different skill to reconnect the landlord to a bygone age of craftmanship. This ebook takes a glance at conventional telescopes outfitted by means of the good tool makers of the 18th and nineteenth centuries, quite the dynastic telescope makers, together with Dollond, Alvan Clark, Thomas Cooke & Sons, and Carl Zeiss. additionally incorporated are lesser luminaries corresponding to John Brashear, John Calver, William Wray, Henry Fitz, and William Henry Mogey.
'Classic Telescopes' covers the most important beneficial properties of the telescopes designed through those brands, and exhibits how a heady blend of industry developments, device situation, and pedigree will dictate their costs at public sale. 'Classic Telescopes' additionally exhibits the reader how to define actual deals! Interviews with best vintage telescope creditors (and clients) give you the top information of prospecting for a real acquisition.
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Extra info for Classic Telescopes: A Guide to Collecting, Restoring, and Using Telescopes of Yesteryear
In diameter, a number of larger Dollond refractors have been documented in the literature. Most were made under George’s watch, and so date to the first half of the nineteenth century. The largest observatory-class refractor in the United States before 1830 was a 5-in. Dollond achromat, which was acquired by Yale University in 1829. It was bequeathed to the university as a gift from Sheldon Clark and was housed in Yale’s astronomical observatory, called the Atheneum, which, at the time, consisted of just a spacious room perched atop a large tower on the university campus.
F/18 Cooke-Taylor photovisual instrument. The sharp, contrasty views they both served up were very impressive. But was this representative of what others have experienced? How did these refractors of old settle with folk who have had the pleasure of using them over years and decades? First, Douglas Daniels was contacted, president of the Hampstead Scientific Society, England, who has had the immense good fortune of using the observatory’s 6-in. F/15 Cooke since 1967. Modern Perceptions 35 Fig. 6 The second drawing of Saturn by Will Hay showing the great white spot 6 days after his discovery sketch (Image credit: Martin Mobberley) Doug spoke about his background and how he became acquainted with Cooke refractors (Figs.
From this unassuming, rented premises, Cooke began work repairing and making instruments to order. Throughout the eighteenth century, Britain had established a solid lead in optical glass manufacture, attributed no doubt to the extraordinary success of the Dollond dynasty and the many artisans who grew up around them. Yet, by the second decade of the nineteenth century, England’s optical glass industry was crippled. In a penetrating modern analysis, historian Myles Jackson referred to the affair as “the British Crisis,” in which the government maintained a stranglehold on the glass furnaces by enforcing heavy taxes on the manufacture of crown and flint glasses, while domestic types were exempt from duty.