Introduction of fisheye glasses

The fisheye lens is an extreme wide-angle lens, and "fisheye lens" is its common name. In order to make the lens reach the maximum photographic angle, the front lens of this kind of photographic lens protrudes to the front of the lens in a parabolic shape, which is quite similar to the fish's eyes, hence the name "fisheye lens". Fish-eye lens is a special kind of ultra-wide-angle lens, and its visual angle strives to reach or exceed the range that human eyes can see, especially in many large occasions or narrow spaces. If you want to create more space, you need fish-eye lens.