20mm f/2.8 USM EF Lens - Cash-In with Canon Rebate Final Cost $509.95

"This lens lets you capture more by broadening the angle of view and increasing the depth of field bringing more area into focus. By expanding the apparent distance between the foreground and background, it provides a unique perspective. The exceptional compactness also allows for greater mobility. With the large maximum aperture, excellent background blur is possible even with a fast shutter speed. The aspherical lens element makes the lens compact and corrects spherical aberrations. The image is sharp even at the edges. Lead-free glass is used."