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Are My Figures Correct?

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Posted by Yarb/">Yarb on September 19, 1999 02:00:29 UTC

I am working with a small mirror, 3 5/16". I ran several test and found the radius of curvature to be 59.5", giving me a focal legnth of 29.750" Am I correct that the f:number of this mirror is f:8.98 ? ( 29.750/3.3125 = 8.981132 ) If the above figures are correct what would be the correct diagional mirror size and the recommended Eye piece. Also, what is meant by the term "Fast Newtonian " Thanks, YARB

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