Bring those far away subjects in close. The TC-DC58B converts the focal length of the body lens by a factor of approximately 1.5 (35 mm film equivalent at maximum telephoto: approximately 648 mm) when attached. The TCDC58B Telephoto Lens Converter screws into the front of the S2 IS's existing lens to provide greater magnification (1.5x), for those times when you are shooting distant subjects that you do not want to disturb, such as children, pets, or wildlife.