As a follow-up, I wanted to mention Dan Joyce, who I have ground 4 mirrors with over the past couple of years. A 6" f/5.3, 16" f/5, 8" f/4.6, and now the 14" f/4.6. Dan is a legend in the art of mirror making and often brings photos to the optical shop from Don Parker, who images with a telescope featuring a Joyce mirror - specifically a 16" f/6 specimen. My favorite set of pictures are a direct comparison between Parker's images of Mars in 2003 with the Hubble Space Telescope. The detail seen in the Parker Photos is startling and true testament to what Quality Newtonian Optics can do.

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