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Terry Wood

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

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12.5 inch f/4.2 conical primary mirror

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This superb 12.5" f/4.2 conical cross-section primary was purchased new about 13 years ago. The mirror is approximately 3/8" thick at the edge and 1-3/4" thick through the center, as measured through the center hole. Shortly after receiving it, I sent it to RF Royce, for a thorough assessment. Robert determined minor improvements could be made and refigured it in January 2005. The mirror was then re-coated and has remained in dry climate storage ever since. I unwrapped this mirror for the first time since it was recoated only several weeks ago and it still appears fresh with no noticeable deterioration. The first few tiny dust particles settled on it while taking these photos.

Besides being refigured by RF Royce to exceptionally high standards, another feature worth noting is the fast focal ratio of this mirror. Robert is known for his affinity to longer f/ratio mirrors, so obtaining a Royce (re)figured mirror this fast is an exceptional opportunity, and I am confident the buyer will be very pleased with the purchase.

I'm asking $1,550 for immediate sale, but am willing to entertain near offers. Please contact me for more details regarding the history of this fine mirror, and thank you for viewing.