anastigmat

[uh-nas-tig-mat, an-uh-stig-mat]

noun

Optics.

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

anastigmat

/ æˈnæstɪɡˌmæt, ˌænəˈstɪɡmæt /

noun

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

Word History and Origins

Origin of anastigmat¹

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

Word History and Origins

Origin of anastigmat¹

C19 from _an- + _astigmatic

Example Sentences

This makes a most desirable outfit at a surprisingly low price for an anastigmat equipment.

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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.

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But an anastigmat lens can be so corrected as to permit the use of larger diaphragm openings and still produce sharp, clear negatives.

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

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For those, however, who wish even greater efficiency and capabilities, we supply the anastigmat lens equipments.

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