Extreme wide-angle lens with an angle of view exceeding 100 degree and sometimes in excess of 180 degree. depth of field is practically infinite and focusing is not required.

An extreme wide-angle lens that can produce a distorted, circular photograph.

An extreme wide angle lens, which distorts the image so radically that the edges seem wrapped into a sphere.

an extreme wide angle lens which does not attempt to correct the distortion and produces an image like you would see in a convex mirror

An extremely wide-angle lens that enables views exceeding 100 degrees up to 180 degrees, but distorts the image.

This is an extremely wide-angle lens. A fish-eye lens magnifies the parts of the image near the center of the image and reduces the parts that are far away from the center.

An extremely wide-angle lens that can take in a huge panoramic view but distorts the edges of the image.