The eyepiece for the 24” telescope is on the far left center. The main telescope of the rooftop observatory, however, is a 24-inch Cassegrain reflector. The black box mounted on the 6” refractor is the Telrad. A Ritchey-Chrétien telescope ( RCT or simply RC ) is a specialized variant of the Cassegrain telescope … (This is a device that produces a “bullseye” pattern that is helpful in aiming the telescope … A George Ritchey's 24-inch (0.6 m) reflecting telescope, the first RCT to be built, later on, display at the Chabot Space and Science Center in 2004. The CDK24 has a dual truss design, with 3 cooling fans for the back of the … Hubble Optics, known for manufacturing high-quality Newtonian reflector optics, now offers the UL24, a 24-inch f/3.3 ultra-light Dobsonian ($9,500). Introducing the PlaneWave Instruments CDK24, a 24 inch (0.61 m) f/6.8 Corrected Dall-Kirkham Astrograph telescope. The eyepiece for the 6” refractor is on the left center (to the right of the 24” telescope eyepiece). This fast Newtonian reflector is built for … The observatory also has some of the original equipment, such as a transit, which is an astronomical telescope …

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