THE SECRETARY TO THE RUSSIAN PROTECTOR IN THINGS AND IN MORAVA, PRAGUE, inv. 2118, sig. 109-8/1

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English Translation

Under depth of field one understands objects at the same time sharply from the construction of the lens and distance setting. The g r öse e je seht he the object removal (small deep district. Short-range lenses from the near foreground to the Infinite deep district increases to the rear, against