Canon EF-S 17-55mm f2.8

With a constant f/2.8 aperture throughout the zoom range and a 3 - stop Image Stabilizer, the EF - S 17 - 55mm f/2.8 IS USM provides outstanding performance and framing flexibility in low light conditions. Wide angle zoom for EF - S mount bodiesf/2.8 aperture throughout zoom range3 - stop Image StabilizerFast, quiet auto focusSuper Spectra coatingCircular aperture for pleasing background...