barrel distortion


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Related to barrel distortion: Pincushion distortion

barrel distortion

irregular image produced when peripheral magnification is greater than axial magnification. See: Petzval surface.
Farlex Partner Medical Dictionary © Farlex 2012

bar·rel dis·tor·tion

(bar'ĕl dis-tōr'shŭn)
Irregular image produced when peripheral magnification is greater than axial magnification.
See: Petzval surface
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Resolution: 15 [Excellent), Contrast: Excellent, Astigmatism: None, Curvature of Field: None, Rolling Distortion: None, Pin Cushion Distortion: None, Barrel Distortion: None, Color Fidelity: Excellent
Photos taken through the ultra-wide angle sensor display a considerable amount of barrel distortion, which becomes more apparent if the composition isn't right.
But it does suffer from some minor radial barrel distortion, causing straight lines to curve as they move away from the center of the frame.
MODEL: SOLO RECON R/T 8X28MM .10X50MM TYPE: MONO MONO BINO BIND RESOLUTION: 6 6 8 8 CONTRAST: Excell Excell Excell Excell ASTIGMATISM: No No No No CURVATURE OF FIELD: Yes Yes Yes Yes ROLLING DISTORTION: No No No No PIN CUSHION DISTORTION: Slight Slight Slight Slight BARREL DISTORTION: No No No No COLOR FIDELITY: Excell Excell Excell Excell MODEL: 4-16X50MM 5-20X50MM 20-6OX85MM TYPE: RIFLESCOPE RIFLESCOPE SPOTTING SCOPE RESOLUTION: 8 10 15 CONTRAST: Excell Excell Excell ASTIGMATISM: No No No CURVATURE OF FIELD: No No No ROLLING DISTORTION: No No No PIN CUSHION DISTORTION: No No No BARREL DISTORTION: No No No COLOR FIDELITY: Excell Periphery Excell Clearly the HD Extra-low dispersion glass is better and is higher priced.
It also helps to avoid using wide angle lenses, as their 'barrel distortion' exaggerates the leaning effect at the frame's edge.
In terms of distortion, the 26mm lens has fairly well-controlled barrel distortion. We do see some chromatic aberration around the edges in some of our sample shots, but only in situations of strong contrast brought on by a strong backlight.
Distortion stretching the shape in the diagonal direction is called pincushion distortion, and that which compresses the shape in the diagonal direction is called barrel distortion.
However, the initial few photos that we took had the same amount of barrel distortion seen on the Galaxy M20's camera.
We also noted a slight amount of barrel distortion. The Nikon also exhibited more internal flare than any of the other models.
The ultra-wide angle lens also has high barrel distortion making straight lines appear curved.