File:Astigmatism.png

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	07:36, 12 November 2006		550 × 750 (61 KB)	Dicklyon	Page explaining and illustrating astigmatism. Frederic Eugene Wright, ''The Methods of Petrographic-microscopic Research, Their Relative Accuracy and Range of Application'', Carnegie institution of Washington, 1911.

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Horizontal resolution	28.35 dpc
Vertical resolution	28.35 dpc