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Re: 8" EQ's - Celestron Vs. Apogee

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Posted by Jim.L on January 23, 2000 10:16:16 UTC

: I fiured it out, if you divide the focal length by the aperture you should get the focal ratio, (according to what I have read). This should give the Celestron g8n a focal ratio of f/10.

1"=25.4mm, 25.4 multiplied by 8= 203.2mm, 1000 divided by 203.2= 4.92.. f/5

Atlest thats how I do it.

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