phone lens used for long range photos. the lens are compatible with Apple iPhones,Panasonic,Sony-Ericsson,Toshiba,HTC,Blackberry,LG,Nokia,Motorola,Samsung,Palm can zoom in 40x. has an eyepiece diameter of 22mm, length of 15cm, and field of view of 1500-9500m. is in round shape. has prism type of BAK4.