The DCR-FE180PRO lens captures an amazing wideangle view of 180° diagonally across the image area - great for creative shooting. 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 DCR-FE180PRO lens attaches directly to the Olympus E-10 & E-20 digital cameras, and includes two adapter rings for 58mm & 52mm lens mounts.