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Terry Wood

Jupiter (clearer) Nov 5th 2023 w/Mewlon 180c

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13.1" layer of Aluminum

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Offered is a very thin layer of Aluminum that is attached to the glass blank via vacuum deposition and follows the blank's shape.     ø334mm (13.1"), thickness ~100 nm, weight ~ 0.2g ! ☺

The glass blank ø334mm, 33.6mm thick was possibly made by Coulter Co. (?)
According to a brief test (see report from Coating company) it has a good correction from the edge to 50% and could be a decent performer. UPS shipping  estimated to ~ $30.

Updated 10/11/22: the focal length of the mirror appr. 60" .   ø13.1,   F / 4.5÷4.6.