The cheapest I could find. This is newest announced lens from Sony.

Manufacturer description: Sony’s first 16-55 mm (24-82.5 mm full-frame equiv.) APS-C zoom with a constant F2.8 aperture is remarkably compact while offering performance befitting the G Lens series. A new optical design delivers excellent corner-to-corner resolution, and beautiful bokeh is available when needed. It is compact, lightweight, and ideal for a wide range of subjects.