Canon 17-55mm f2.8 IS USM Lens

The large circular aperture produces a shallow depth-of-field, creating background blur that draws attention to the photographic subject. Image Stabilizer lens groups shift to compensate for camera movement so that the image appears steady on the image plane, ensuring clear, crisp images, even in dim light. With a Ring-type USM, inner focusing and new AF algorithms, this lens achieves autofocus quickly and quietly, and with full-time mechanical manual focusing, manually adjusting the focus is possible even in AF mode.