The full force of Sony's latest lens technology brings stunning G Master resolution and exquisite bokeh together in the world's lightest2 Full Frame F2.8 constant aperture Standard Zoom lens. With significantly evolved AF performance, the FE 24-70mm F2.8 GM OSS II can deliver the full potential of today's advanced still and movie cameras.Superb image quality that rivals the best primesExcellent contrast at high spatial frequencies means superb resolution even at F2.8. Two high-precision XA (extreme aspherical) elements, two ED (Extra-low dispersion) glass elements, two Super ED glass elements, and a floating focus mechanism control aberration, realize sharp, clear images at all zoom and aperture settings.Small, light and versatileThis lens is the smallest and lightest F2.8 24-70mm zoom in its class. It weighs just 24.6 oz (695 g), over 20% less than the previous model. It is 16 mm shorter, and overall volume has been reduced by approximately 18%. Excellent mobility makes it a great choice for professional or enthusiast still or movie use in a wide range of situations.Beautiful G Master bokehBeautiful, natural F2.8 bokeh extends throughout the zoom range thanks to advanced optics and a new 11-blade aperture unit. Bokeh is enhanced by precise control of spherical aberration during both design and manufacture. Two precision XA elements manufactured to 0.01 -micron surface precision suppress onion ring bokeh, while ED glass