fisheye lens
noun [ C ] art specialized uk/ˌfɪʃ.aɪ ˈlenz/ us/ˌfɪʃ.aɪ ˈlenz/
鱼眼镜头，超广角镜头
a camera lens that curves out from the camera and gives a view of an extremely wide area, with the central objects appearing closer than those at the edge