Use of Schmidts with Image Tubes

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  Cassegrain-Schmidt Image Tube Camera [#2]

  Additional Formats

  [Incl c.ltr ISB to WABaum]

  Bowen

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  Cassegrain-Schmidt Image Tube Camera [#1]

  Additional Formats

  [Incl c.bids for camera; c.ltr Arthur A. Hoag to ISB]

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  "Optical Systems [for Use with Image Intensifier Tubes]."

  Additional Formats

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  Image Tube Spectrograph [#2]

  Additional Formats

  [Incl c.ltr ISB to WABaum]

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  Image Tube Spectrograph [#1]

  Additional Formats

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  Image Tube Reimage Camera

  Additional Formats

  [folded]

  Bowen