A "fisheye" refers to a type of camera lens that captures a very wide-angle view, making objects appear distorted and curved, similar to how things might look through a fish's eye.
The Tango set of sensors and software further include fisheye camera and fixed focus. (bgr.in)
Since the Earth is rotating at a steady 1,040 mph I created a custom rig of 4 cameras with fisheye lenses to capture the entire night - sky in motion. (treehugger.com)
We see this generally as a good thing, but such a wide - angle lens does come with a strong fisheye effect and distorts objects that are close to the camera. (digitaltrends.com)