File:PSM V57 D020 Relative images taken with different focal lengths.png

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English: Relative images taken with different focal lengths
Date
Source Popular Science Monthly Volume 57
Author Unknown authorUnknown author

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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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Date/TimeThumbnailDimensionsUserComment
current06:36, 12 November 2016Thumbnail for version as of 06:36, 12 November 20161,828 × 2,799 (866 KB)Ineuw (talk | contribs)Cleaned image and improved contrast
20:29, 25 July 2015Thumbnail for version as of 20:29, 25 July 20151,828 × 2,799 (1.07 MB)Cmdrjameson (talk | contribs)Compressed with pngout. Reduced by 842kB (43% decrease).
03:36, 27 June 2011Thumbnail for version as of 03:36, 27 June 20111,828 × 2,799 (1.89 MB)Ineuw (talk | contribs)

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