File:BBT Airmail type M-8-D Landing Floodlight (1677708651).jpg

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Description Yes, it's big. That's a Fresnel lens. Here is <a href="http://en.wikipedia.org/wiki/Fresnel_lens" rel="noreferrer nofollow">the Wikipedia Article </a>about these marvelous devices. These lenses come in all sizes from the smallest hand held magnifying lens to the largest found it coastal light houses.
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Source BBT Airmail type M-8-D Landing Floodlight
Author born1945

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This image was originally posted to Flickr by born1945 at https://flickr.com/photos/12567713@N00/1677708651. It was reviewed on 9 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

9 December 2020

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Date/TimeThumbnailDimensionsUserComment
current08:31, 9 December 2020Thumbnail for version as of 08:31, 9 December 20203,372 × 2,853 (1.63 MB)JotaCartas (talk | contribs)Transferred from Flickr via #flickr2commons

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