Tamron SP 17-50 F/2.8 VC

The 17-50’s wide aperture and outstanding performance provide practical advantages in low-light shooting and aesthetic image control. The lens delivers impressive sharpness and striking contrast over its entire focal-length and aperture range, and at its maximum aperture of f/2.8 it produces beautiful images enhanced by shallow depth of- field, and smooth, natural transitions in out-of-focus areas of the image (i.e. excellent bokeh.)