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20-inch Maksutov corrector lens For Sale

Price - $3,200.00

Ad Number: 221886

Posted: 06 Sep 2020

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For Sale
20-inch Maksutov corrector lens. This has been on an going project for some 20-years. Time is up. Requires a 20+inch diameter mirror.

R1 (concave) = 27.50
R2 (convex) = 27.40
Thickness = 1.80
Material = BK 7 (Borosilicate crown)

Corrector has about a 19.2 inch clear aperture. Lens is fine ground on concave surface, and a partially ground on convex side. System is for an f/3.6 prime focus or alternate Cassegrain with separate secondary mirror. More details on request. If competed, this would be amoung largest Maks in the world. I have heard there is 26-inch in Russia.

Experienced ATM with equipment needed.
$3200 plus 3% if using PayPal or reasonable offer.

Thanks for looking.


  • Condition Unused Corrector
  • Location Danville, CA 94526

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