The technical details behind this lens A part of Sony's respected G Master series, this lens maintains an f/2.8 maximum aperture throughout its 24-70mm focal range. The speed of the lens assists in low-light and high-shutter-speed photography, while providing a smooth bokeh through a nine-blade diaphragm. Versatile and Durable With a wide-to-portrait length zoom range the lens is an asset in any kit, wide enough for capturing landscapes and shooting in city laneways, but also with sufficient zoom to photograph intimate portraits. It's also dust and moisture sealed for operating in difficult climates. Sharp and True The combination of an extra low-dispersion element and a Super ED element in the lens design help reduce chromatic aberrations and colour fringing. Additionally, a NANO AR Coating reduces lens flare, reflections and ghosting in strong lighting conditions.