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anastigmat

American  
[uh-nas-tig-mat, an-uh-stig-mat] / əˈnæs tɪgˌmæt, ˌæn əˈstɪg mæt /

noun

Optics.
  1. a compound lens corrected for the aberrations of astigmatism and curvature of field.


anastigmat British  
/ æˈnæstɪɡˌmæt, ˌænəˈstɪɡmæt /

noun

  1. a lens or system of lenses designed to be free of astigmatism

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of anastigmat

1885–90; < German, back formation from anastigmatisch anastigmatic

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

In a true anastigmat, it is entirely eliminated.

From Kodaks and Kodak Supplies 1914 by Canadian Kodak Company

For those who want the microscopic definition of the anastigmat, we offer the Vest Pocket Kodak, this year, fitted with the new Kodak Anastigmat lens.

From Kodaks and Kodak Supplies 1914 by Canadian Kodak Company

It is an anastigmat of the very first quality, fully corrected for definition and flatness of field, and working at a speed of f.6.3.

From Premo Cameras 1914 by Canadian Kodak Company

This larger opening admits more light within a given time than that of the R. R. lens, hence the anastigmat is much faster.

From Kodaks and Kodak Supplies 1914 by Canadian Kodak Company

The Price Six-Three Kodak No. 1A, 2½ × 4¼, Cooke Kodak anastigmat lens, f.

From Kodaks and Kodak Supplies 1914 by Canadian Kodak Company

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