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pincushion distortion

A type of lens distortion that occurs when the edges of a photograph bend inward. It is most easily noticeable when straight lines in a scene are distorted towards the center of a picture of the scene.

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pincushion distortion

An optical distortion, common in less expensive lenses, where parallel lines on the horizontal or vertical plane bow inward. Pincushion distortion is the opposite of barrel distortion.
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pincushion distortion

The opposite of barrel distortion; straight lines are bowedin toward the middle to resemble the sides of a pincushion; present in smal amountsin some telephoto and telephoto-zoom lenses.
mirglossary

pincushion distortion

Lens aberrations that make the borders of an image bow slightly inwards to the centre forming a shape like pincushion.
ephotozine