barrel distortion


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Related to barrel distortion: Pincushion distortion

barrel distortion

See distortion.

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.

barrel distortion

A screen distortion in which the sides bow out. Contrast with pincushioning.
References in periodicals archive ?
Lastly, the lens exhibits abnormally high amounts of barrel distortion, with the curvature being apparent all through the frame.
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).
We noted no astigmatism, curvature of field, barrel distortion, or rolling distortion.
During testing I detected no spherical aberration, astigmatism, barrel distortion or rolling distortion.
And barrel distortion from such lenses can often be used to a photographer's advantage.
The secondary camera also produces some barrel distortion, which many will like, but some may not.
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).
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.
With B.O.SS Active, we also expect lesser barrel distortion and vignetting of image, along with the smoothness of videos.
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.