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Channeling a 15" Pitch Lap (Part 2) for the 20" f/4.5 Telescope Mirror

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Uploaded on Mar 16, 2010

Part 2 of this lap-making demonstration shows how to cut channels into the 15" pitch lap. Gordon Waite shows the use of a Japanese saw for cutting the pitch lap, along with techniques for micro-faceting and brushing to prepare for polishing the mirror.

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