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Re: [ATM] help with DK secondary

Forgot to mention in my other post that you need to have the
glass on the bottom while doing the chordal strokes so as to make
the bottom surface more convex.  This may polish in some
astigmatism so be aware of truning the glass in the holder often
or you wil grind in a lot of astigmatism!
Bob May

rmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net


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