File:US Navy 040813-N-5328N-004 Electrician's Mate 3rd Class Ryan Pritchard looks through the center of a fresnel lens while testing a new lamp to ensure it is working properly, at the lighthouse on board Naval Air Station (NAS) Pensacola.jpg

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English: Pensacola, Fla. (Aug. 13, 2004) – Electrician’s Mate 3rd Class Ryan Pritchard looks through the center of a fresnel lens while testing a new lamp to ensure it is working properly, at the lighthouse on board Naval Air Station (NAS) Pensacola. U.S. Navy photo by Gary Nichols (RELEASED). 1st order Fresnel lens (1869), one of very few of its type still in service in the U.S.
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This image was released by the United States Navy with the ID 040813-N-5328N-004 (next).
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Author U.S. Navy photo by Gary Nichols

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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.

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current12:30, 23 October 2009Thumbnail for version as of 12:30, 23 October 20092,400 × 1,596 (636 KB)BotMultichillT (talk | contribs)== {{int:filedesc}} == {{Information |description={{en|1=Pensacola, Fla. (Aug. 13, 2004) – Electrician’s Mate 3rd Class Ryan Pritchard looks through the center of a fresnel lens while testing a new lamp to ensure it is working properly, at the

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