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Chris Elkins

CME during Totality

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Two matched 12" f/5 lightweight mirrors (read) - Pending to Bill L

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I felt very lucky to run across these scientific surplus mirrors.  Each mirror is 12.375" diameter and weighs a little over 8 pounds.  Edge thickness is about 0.68" with a rounded back that has about a 0.521" gap to the table.  By my calculation that is a RoC of 37" for the rear surface.  Coatings are probably just standard aluminum and seem serviceable to me, but do have some light sleeks.  Glass is not green and thus not simple plate glass.  I'd assume pyrex.

They are in good condition without any serious scratches or chips that I can see.  (Those odd-shapes at the edge are places where clips covered and don't have aluminizing.  They are not chips!)  A local ATM tested them on his foucault tester to have very nice smooth spherical figures with a focal length of 60" and seem to be matched within our ability to measure accurately.

I was planning to "pull" these into a parabola using the mechanical techniques well known on the internet, but realize I'll probably not get to this project.  Steve Swayze has said he could parabolize them if wanted.

Prefer to sell as a set for $500, but will sell individually for $250 each if necessary.  They will be well packed with high-density foam for shipping.