Re: [ATM] Two mirrors small size difference

["Bob May" <bobmay@nethere.com>]

When you think about how you mreasure saggita, the smaller mirror
should have a smaller sag. if you measure with a straightedge
across the whole mirror.  One of the ingredients of the sag.
calculations is the radius of the measurement circle and since
you have two different diameters, you'll get two different sag.
measurements!
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
Addresses have been munged up to keep spammers from bothering me.
replace the obvious words with the proper character.
Thank you for your understanding!

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