Download Classic Telescopes: A Guide to Collecting, Restoring, and by Neil English PDF
By Neil English
Classic telescopes are of curiosity to beginner astronomers for various purposes. There are the committed creditors, yet there also are many amateurs who love the nostalgia they motivate. those telescopes "feel" diverse from any modern telescope and maybe have a special skill to reconnect the landlord to a bygone age of craftmanship. This publication takes a glance at conventional telescopes equipped by way of the good device makers of the 18th and nineteenth centuries, really 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 main gains of the telescopes designed by means of those brands, and indicates how a heady mix of marketplace tendencies, tool situation, and pedigree will dictate their costs at public sale. 'Classic Telescopes' additionally exhibits the reader how to define actual offers! Interviews with best vintage telescope creditors (and clients) give you the most sensible assistance of prospecting for a real acquisition.
Read or Download Classic Telescopes: A Guide to Collecting, Restoring, and Using Telescopes of Yesteryear PDF
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Additional info for Classic Telescopes: A Guide to Collecting, Restoring, and Using Telescopes of Yesteryear
But it soon became evident that such an occupation was not for the dreamy boy who pined for maritime adventures. Bright and curious, Cooke soon resumed his learning, teaching himself mathematics, navigation and astronomy. ) to seek local employment instead. From 1829 to 1836, he pursued a teaching career as an assistant schoolmaster and private tutor. And it was during this time that he met his future wife, Hannah Milner. Cooke’s interest in practical optics impelled him to begin work on his first telescope, one of the lenses of which he ground from the bottom of a whiskey tumbler and mounted the objective inside a tin tube that he soldered together from scrap N.
On the same site, there were two smaller domes. One contained the Fry Telescope - an 8-inch Cooke. 36 2 A Yorkshireman Makes Good Fig. 7 A portable 3-in. f/15 Cooke refractor c. 1900 (Image credit: Richard Day) Once again the Cooke was the instrument that impressed most. On most nights of average seeing, it could easily outperform the 18-inch Grubb. Only when the seeing was excellent could the Grubb show slightly more detail. Doug was more than happy to recount the telescope’s long history. The Cooke was once owned by a member – George Avenell, and we know that it was in use at the observatory in 1923.
Next, we sought the opinion of Dr. 5 cm, 15 cm (Cooke, my own), 20 cm (Cooke, Cambridge), 30 cm (Cooke apochromat, Cambridge) and 83 cm (Meudon Observatory). The problem is, I have no basis of comparison with other makes. Until 1988, the Northumberland telescope at Cambridge had a 30 cm Cooke apochromat, as the old lens from the c. 19th had worn so much it was too small to safely fit in the original cell. After the devitrification of one component, Jim Hysom made a new lens for that year, 1988.