Target-optic-trains

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Revision as of 10:50, 11 March 2007 by 68.3.161.63 (talk) (New page: Dahl-KirkHam design with 48 inch primary can have tub only 48 inches long. It uses a standard mirror blank with no hole in the middle)
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Dahl-KirkHam design with 48 inch primary can have tub only 48 inches long. It uses a standard mirror blank with no hole in the middle