[. . . ] ????? Specifications when used with FE 28mm F2 (SEL28F20) SEL075UWC Model name Focal length (mm) 21 35mm equivalent focal 31. 5 length*1 (mm) 92 Angle of view 1*2 Angle of view 2*2 68 Minimum focus*3 (m (feet)) Auto focus 0. [. . . ] *2 Angle of view 1 is the value for 35mm cameras, and angle of view 2 is the value for Interchangeable Lens Digital Cameras equipped with an APS-C sized image sensor. *3 Minimum focus is the distance from the image sensor to the subject. Included items SEL075UWC Ultra wide converter (1), Lens case (1), Lens cap (for the front and back of the lens) (2), Set of printed documentation SEL057FEC Fisheye converter (1), Lens case (1), Lens cap (for the front and back of the lens) (2), Set of printed documentation Design and specifications are subject to change without notice. Be careful not to subject this unit to mechanical shock while attaching it. Be careful when placing the camera on a table or other flat surface with this unit attached. The rim of this unit?s lens hood touches the table so the camera body is at an unstable angle. This lens is not water-proof, although designed with dust-proofness and splash-proofness in mind. When using a built-in flash or supplied flash, the lens may partially block the light of the flash, resulting in a shadow at the bottom of the picture. When using the SEL075UWC with your lens, use a separately sold flash that has a flash coverage compatible with the focal length of the lens. The SEL057FEC produces a very wide angle of view, so the corners of the screen appear darker than the center when shooting together with a flash. We recommend bounce shooting by attaching an external flash to the camera. Check that the interchangeable lens FE 28mm F2 (SEL28F20) is attached to the camera. [. . . ] Carefully insert this unit into the interchangeable lens and slowly rotate it clockwise until it locks into place. 2 While sliding the lock release on this unit, fully rotate this unit counterclockwise and detach this unit. [. . . ]