A high-performance 16-25 mm wide-angle zoom G Lens that is compact and lightweight 3 ED glass elements, 3 aspherical elements, and 1 ED Aspherical glass element for high resolution Stunning close-ups with smooth bokeh enhanced by an F2.8 aperture and 11 aperture blades Refined AF for outstanding speed, reliable tracking, and quiet operation Full creative control with independent focus, zoom, and aperture rings Weight – 409 grams