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Celestron Telescope O-a7d
Show and tell the Celestron C90 telescope with Maksutov-Cassegrain optics, 90 mm aperature, 1 m focal length, and f/11 focal ratio. Fishbane Chapter:   37.5 HRW 9th:   34.09 PIRA DCS classification:   6A70.201

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Physics Lecture Demonstrations at the Department of Physics and Astronomy
The Johns Hopkins University