Check out the Canon 16-35mm f2.8 III. Beats a 15mm Zeiss prime: http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1073&Camera=979&FL

Check out the Canon 16-35mm f2.8 III. Beats a 15mm Zeiss prime: http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1073&Camera=979&FLI=0&API=0&LensComp=794&Sample=0&CameraComp=979&FLIComp=0&APIComp=0 http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-... And it is a zoom.