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telescope
(redirected from Cassegrain focus)

   Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.01 sec.
See: abridge, abstract, constrict


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Placing a wide to medium telephoto lens piggyback on a serious amateur telescope like my C-8 allows use of the clock drive to minimize star trailing, while the lens of a 35mm camera is almost always both "faster" and more contrasty than the C-8 telescope, which at Cassegrain focus is a 2000mm f/10 lens.
 
 
 
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