Canon EF 24-70mm f/4L IS USM Lens Review,Canon EF 24-70mm f/4L is USM Lens(Japan Import-No Warranty,Amazon.com : Canon EF 24-70mm f/2.8L II USM Standard Zoom,Canon EF 24-70mm f/4L IS USM review: The ideal standard zoom,Canon EF 24-70mm f/4L IS USM Lens Review