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Image: 1st order Fresnel lighthouse lens

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Description: My own work. Shot at Point Arena, CAGabelstaplerfahrer (talk) 02:11, 24 August 2010 (UTC)
Title: 1st order Fresnel lighthouse lens
Credit: Own work
Author: Gabelstaplerfahrer at English Wikipedia
Usage Terms: Creative Commons Attribution 3.0
License: CC BY 3.0
License Link: http://creativecommons.org/licenses/by/3.0
Attribution Required?: Yes

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