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<dl><dd>Three articles by Lummer, published in the Zeitschrift für Instrumentenkunde in 1897, form the basis of the present work</dd>
<dd>Chapter XII, "Some recent British objectives," chapter XIII, "Tele-photographic lenses," and appendix I, "Seidel's theory of the five aberrations," have been added by the translator</dd></dl><br>Subjects: Photographic optics</div>
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<dl><dd>Lummer, O. (Otto), 1860-1925</dd>
<dd>Thompson, Silvanus P. (Silvanus Phillips), 1851-1916</dd></dl></div>
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