barrel distortion

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Related to barrel distortion: Pincushion distortion

barrel distortion

Collins Dictionary of Astronomy © Market House Books Ltd, 2006

barrel distortion

[′bar·əl dis′tȯr·shən]

(optics)

A defect in an optical system whereby lateral magnification decreases with object size; the image of a square then appears barrel-shaped.

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References in periodicals archive ?

Lastly, the lens exhibits abnormally high amounts of barrel distortion, with the curvature being apparent all through the frame.

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Zoom lenses tend to produce barrel distortion at wide-angle positions and pincushion distortion at telephoto positions (due to slight changes in distortion characteristics during zooming).

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We noted no astigmatism, curvature of field, barrel distortion, or rolling distortion.

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During testing I detected no spherical aberration, astigmatism, barrel distortion or rolling distortion.

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And barrel distortion from such lenses can often be used to a photographer's advantage.

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* Flat field of view (very little pincushion or barrel distortion)

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The secondary camera also produces some barrel distortion, which many will like, but some may not.

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Focusing the scopes on the distant brick wall with its very distinct vertical and horizontal lines, we checked for pincushion distortion (lines bowing in) and barrel distortion (lines bowing out).

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The main problem with this setup is that the wide angle lens brings barrel distortion. This is when your photos appear spherical instead of linear.

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With B.O.SS Active, we also expect lesser barrel distortion and vignetting of image, along with the smoothness of videos.

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Any lens with focal length below 35mm would usually have barrel distortion, and it is noticeable even in some 35mm lenses, from wide point-of-views.