* Choosing a thin mirror blank gets you more aperture for your dollar. * Thin mirror blanks are less expensive, allowing more people to afford the hobby of grinding their own telescope mirror. There are several advantages to using thin plate glass mirror blanks for grinding your telescope mirror: Pyrexīenefits of using thin plate glass mirror blanks? Read the full Sky and Telescope magazine article here: Plate vs. Simply put, plate glass blanks take on and maintain every bit as accurate a parabola as Pyrex blanks. Please visit our Buy Mirror BlanksĪs Sky and Telescope Magazine puts it, "the idea that Pyrex telescope mirrors are better than those made from plate glass" is "demonstrably incorrect and may have caused many a telescope owner unnecessary effort, expense, or angst". We provide mirror blanks from 4.6" to 12.6" in 3/4" thickness, and thicker 1" mirror blanks upon request up to 18 inches in diameter. All blanks test like this, or they don't ship Plastic protractor inserted under a 6 inch mirror blank during a stress test, to illustrate what stress would look like - if there were any present. Providing telescope mirror blanks and kits to telescope makers.
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