The CDK24 has a dual truss design, with 3 cooling fans for the back of the … Introducing the PlaneWave Instruments CDK24, a 24 inch (0.61 m) f/6.8 Corrected Dall-Kirkham Astrograph telescope. 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). The black box mounted on the 6” refractor is the Telrad. The eyepiece for the 6” refractor is on the left center (to the right of the 24” telescope eyepiece). The eyepiece for the 24” telescope is on the far left center. 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. This fast Newtonian reflector is built for … The main telescope of the rooftop observatory, however, is a 24-inch Cassegrain reflector. The observatory also has some of the original equipment, such as a transit, which is an astronomical telescope … (This is a device that produces a “bullseye” pattern that is helpful in aiming the telescope … A Ritchey-Chrétien telescope ( RCT or simply RC ) is a specialized variant of the Cassegrain telescope …

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