This creates visual distortion that is distinct and is often used in creative photography.

What Makes a Fisheye Lens Ultrawide?

A wide-angle lens can capture an image that is about 100 degrees wide.

A view through a fisheye lens of a statue surrounded by pillars.

@mlsartstudio via Twenty20

How a Fisheye Lens Works

All DSLR lenses except fisheye lenses are referred to asrectilinear lenses.

This is because light travels through the lens in a straight path to the image sensor.

This creates the straight lines you see in most photographs.

A view of a baseball stadium captured through a fisheye lens.

@kymdros via Twenty20

This is the very effect that makes these lenses so popular.

That first fisheye lens had an 8mm focal length and an f/8aperture.

There are, however, two approaches to photography with a fisheye lens.

A photograph of a skydiver caught with a fisheye lens.

Rick Neves / Getty Images

The other group of photographers uses a fisheye lens specifically to capture the distortion the lens creates.

Another creative use for a fisheye lens is to take pictures with the lens pointing straight up.

This is useful in cityscape photography or even in landscape photography.

An image of a hammerhead shark captured with a fisheye lens.

Ken Kiefer 2 / Getty Images

One more, slightly obscure use for fisheye lenses is inmobile photography.

Post-Processing for Fisheye Images

Post-processing can play a couple of different roles in fisheye photography:

A bamboo forest photographed looking straight up through a fisheye lens.

@simogarb via Twenty20

An image of a young child captured through a mobile fisheye lens.

Taro Hama @ e-kamakura / Getty Images