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RE: Why The Six Inch?

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Posted by Rick Crockett on March 28, 2000 19:21:07 UTC

Bob mentions the ATM books which I recommend for any serious Tm`r. Several books may mention the system but leave out the math.

A question I have is why use a good mirror for a ten dollar blank? One company even sells astrosital blanks for $25 with an f:5 pre- generated curve. Unless the mirror is bad, I`d sell it, buy the blank and use the extra money for the secondary blank or towards coating. Then somebody gets a good deal on a mirror and you are dollars ahead not to mention time.


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