Abstract
THE chief difficulty met with in taking enlarged photographs of small solid objects is, that unless the thickness of the object is small compared to the focal length of the lens, only a small part or zone appears in good focus at the same time.
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MALLOCK, A. Photographic Enlargement of Small Solid Objects and the Limitation of Definition obtainable on Gelatine Plates. Nature 122, 239–240 (1928). https://doi.org/10.1038/122239a0
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DOI: https://doi.org/10.1038/122239a0
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