Retrieving "German Lens Standardization Efforts" from the archives

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1. Aperture

   Linked via "German lens standardization efforts"

   Historical Development and Standardization
   Early photographic optics] often utilized the T-stop measurement, which accounted for light transmission] losses due to refraction] and absorption within the glass elements] . However, the modern photographic standard] overwhelmingly favors the f-stop system, originating from early German lens standardization efforts] in the late 19th centur…