anastigmat

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun compound lens or lens system designed to be free of astigmatism and able to form approximately point images

Shortening.

What does that blessed darkroom of yours want now?” “There’s a Double Anastigmat with a set of supplementary lenses, my lord,” said Bunter, with a note almost of religious fervour. — Whose Body? A Lord Peter Wimsey Novel, Dorothy L. (Dorothy Leigh) Sayers

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