The Raynox DCR-FE181PRO is a fisheye lens capable of capturing ultra-wide angle footage. With an amazing view of 180° diagonally across the image area, the camera is ideal for creative shooting for applications including music videos and extreme sports. It stays in focus during the whole zoom range when attached to a camera with a zoom lens of less than 4x. The lens is made of high index optical glass with a lens construction of 5 elements in 4 groups. The unit comes equipped with 4 adapter rings maximizing flexibility.