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.

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anastigmat British  

/ æˈnæstɪɡˌmæt, ˌænəˈstɪɡmæt /

noun

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

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Etymology

Origin of anastigmat

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

Example Sentences

The superiority of the anastigmat lens, without attempting to go into the technicalities of the subject, consists of—Perfect definition over the whole negative, absolute flatness of field, and higher speed.

From Kodaks and Kodak Supplies 1914 by Canadian Kodak Company

This lens is an anastigmat of first quality, fully corrected and working at a maximum speed of f.

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

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

From Kodaks and Kodak Supplies 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