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Well corrected two element telescope with a flat image 1981

A simple two element catadiioptric telescope is described which is corrected for spherical aberrartion, coma, astigmaism and Petzval

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Well corrected two element telescope with a flat image 1981
Well corrected two element telescope with a flat image 1981
Well corrected two element telescope with a flat image 1981
Well corrected two element telescope with a flat image 1981
Well corrected two element telescope with a flat image 1981
Well corrected two element telescope with a flat image 1981
Well corrected two element telescope with a flat image 1981
Well corrected two element telescope with a flat image 1981

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