Re: ATM: Grinding to ROC

[Donovan Buck <donovan@bravoz.com>]

>lose an inch or two.  Theres not much to worry about, but flip the mirror for
>the tool now and then to make sure you're not grinding astigmatism into your
>glass.  I made that mistake on a 6" scope I tried to grind to f/15, and had
>to grind it out to f/8 to get rid of it.

Kevin,

You're scaring me. After 120 grit the ROC on my 6" f/6 was about 2" long. I
continued to grind MOT almost exclusively, and now that I'm ready to polish
my ROC is within 1/16" of my target. How would grinding MOT cause
astigmatism. I'm not questioning the validity of your statement, just
wondering how it works.

Thanks,


Donovan Buck
Bravo Zulu! Interactive
www.bravoz.com

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