Sony Constant Aperture Power Zoom G 10-20mm F/4 (E-Mount) LEN1315

E-Mount Lens/APS-C Format 15-30mm (35mm Equivalent) Aperture Range: f/4 to f/22 Power Zoom Mechanism; Internal Zoom Dual Linear AF Motors; Internal Focus Suppressed Focus Breathing ED and Aspherical Elements Dust- and Moisture-Resistant Design Rounded 7-Blade Diaphragm