Fisheye

Distorts an image as if it were seen through the view of a fisheye lens. The result is an extremely wide-angle warping effect also known as barrel distortion. Use the Fisheye filter with a negative Amount value as an imprecise way to correct for barrel distortion in images shot using a wide-angle lens.

Canvas showing effect of Fisheye filter

Adjust this filter using the parameter controls in the Filters Inspector: