Fisheye lenses feature ultra-wide focal lengths that allow them to produce images with extreme distortion; photographers use this unique effect to bring a creative edge to their photography. While there are no set rules as to what you can use a fisheye lens for, they are most commonly used for extreme sports and landscape photography.
Are you wondering what we are talking about when we mention the fisheye effect? Taking a look through the peephole on your front door will give you a clue. There are two main types of fisheye lens available, a circular fisheye which is easy to spot by the black round circle it produces around the lens, and the less extreme full-frame fisheye.