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ppfpics: Zone Plate 8
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ppfpics: Zone plate 10
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ppfpics: Zone Plate 9
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ppfpics: Zone Plate 7
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ppfpics: zone plate 4
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ppfpics: zone plate 3 "Martha Mary Chaple"
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ppfpics: zone plate 2 "tin can racer"
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ppfpics: zone plate 1
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ppfpics: soft focus 1
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ppfpics: Zone Plate 9