Sunspotter Keplerian Telescope
March 17th, 2008 . by admin
Unlike other ways of viewing the Sun, this wooden, folded-Keplerian telescope is safe and easy to use. By using a series of mirrors, the telescope projects a 3 1/2″ (85 mm) image of the sun onto a white viewing screen that can be easily seen by several students at once. They will be able to trace the changing positions of sunspots and compare them on a daily basis. The kid-friendly telescope is a folded refractor, F11, altitude-azimuth design and can be used to observe eclipses as well. — Features: — 27 1/2″ (700 mm) FL objective lens — 2 1/2″ (61.7 mm) objective aperture stopped down to 2 1/4″ (57 mm) — 1/2″ (12.5 mm) fully-coated FL Plssl field lens, four element with a 10 mm aperture — 0.75 field of view (1.5 solar diameters) — 2.2 cm gnomon (30) and 22 cm pinhole projection (3) pointing aids — Overall size: 16″ x 15″ x 6″ — Weight: 6 lbs., 9 1/2 oz.