Happiness in Slavery is only an album.
An ultra wide-angle lens is a lens whose focal length is shorter than the short side of film or sensor .. lens. Photographic lens. focal length. focal length. Thus the term denotes a different range of lenses , relative to the size of the sensor in the camera in question .. For APS-C any lens shorter than 15 mm is considered ultra wide angle .. lens. Photographic lens. APS-C. APS-C. For 35 mm film or full-frame sensor any lens shorter than 24 mm. lens. Photographic lens. For 6x4 .5 cm any lens shorter than 41 mm. lens. Photographic lens. For 6x6cm and 6x7cm any lens shorter than 56 mm. lens. Photographic lens