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In termsof portable astronomical telescopes, the heaviest optical tubes should weigh nomore than about 20 pounds (assembled).. This particular scope comes with a wooden Dobsonian mountwithout any slow motion controls or tracking capability.. Illustration courtesy of Celestron International This article is directed at novice astronomers, meaningamateurs buying their secondtelescope (or first 'serious' scope) after discovering that theirinitial instrument, probably a 60mm refractor or cheap table top Newtonian,lacks sufficient light grasp for viewing many deep sky objects. Prezi kostenloser Download mac
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In termsof portable astronomical telescopes, the heaviest optical tubes should weigh nomore than about 20 pounds (assembled).. This particular scope comes with a wooden Dobsonian mountwithout any slow motion controls or tracking capability.. Illustration courtesy of Celestron International This article is directed at novice astronomers, meaningamateurs buying their secondtelescope (or first 'serious' scope) after discovering that theirinitial instrument, probably a 60mm refractor or cheap table top Newtonian,lacks sufficient light grasp for viewing many deep sky objects. 0041d406d9 Prezi kostenloser Download mac
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They exacerbate the problem by accepting a crude AZ mountingsystem, often made of wood and lacking slow motion controls or any method ofprecisely tracking celestial objects.. It would be hard to imagine a poorer telescopefor a novice, but the story illustrates the 'aperture fever' that isrampant in our hobby.. ) Seeking to remedy alack of light grasp, they err in the opposite direction and buy a telescopethat is too complicated to assemble and collimate, too big, clumsy, heavy anddifficult to transport.. We recently heard about a novice who purchased a 16' truss-type Newtonian refelctor.. It should alsoserve as a warning to more experienced astronomers getting back into the hobbyafter a significant lay off: scopes have gotten bigger while you were away!Let's get 'big' defined from the outset. vijeo look keygen music