Focal Length: 20-70mm E-Mount Lens Full-Frame Format Constant F2 in a compact, lightweight lens 3 XA (extreme aspherical) elements 3 Super ED (Extra-low Dispersion) elements 3 Aspherical, 1 ED (extra-low dispersion) elements Four XD linear motors results in fast, precise and quiet AF Eleven-Blade Circular Diaphragm Standard Zoom Lens
