The Canon EF 24-70mm f/2.8L II USM lens is the company's top-end standard zoom; it's pricey, but a solid performer. Narrowing the aperture shows very minimal improvements; at f/4 the lens Technical Specifications. Focal Length. 24 to 70mm. 18 to 135mm (35mm Equivalent: 28.8 to 216mm) Maximum Aperture. f/4. f/3.5 to 5.6. Minimum Aperture. f/22. Product Description. Canon's EF 70-200mm f/4L IS USM is a lightweight, compact L Series telephoto zoom lens with Image Stabilizer. The optical Image Stabilization in the new EF 70-200mm f/4L IS USM lens provides up to an incredible four stops of shake correction-a first for Canon IS lenses. The Canon EF 24-70mm f/4L IS USM Lens receives Canon's 4-stop Hybrid Image Stabilization Canon EF 70-300mm f/4-5.6 IS II USM Lens. B&H # CA70300ISII MFR # 0571C002. 140 Reviews. Key Features. Canon EF 24-70mm f/2.8L II USM Lens with Accessories Kit. s7g7yws.