dcclark
TPF Noob!
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- Feb 19, 2009
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- Houghton, MI
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Barrel distortion is exactly what you saw in your sample photo above -- the unpleasant "bulging" appearance of the image. To really see it, look at a straight line, and notice how it bends. Fisheye lenses could be said to have "barrel distortion" but it's intentional, and extreme. Most lenses try to avoid it.