The Canon EF 24-70mm f/2.8L II USM ($2,299) is the workhorse lens for many a Canon shooter. With a constant f/2.8 aperture throughout its zoom range, very good optical performance, and a fairly A thin Canon LP1219 Lens Pouch is also included in the 16-35 L IS box. Canon's pouches protect against dust and scratches, but a better storage option should be used for protection from impact. Below is a visual comparison between the following lenses: Canon EF 17-40mm f/4L USM Lens Canon EF 16-35mm f/4L IS USM Lens Canon EF 16-35mm f/2.8L II Features. Canon EF 16-35mm f/2.8L III USM Zoom Lens:Take photos that are clearer and sharper than ever before with this Canon 16-35mm f/2.8 lens. Aspherical lens elements ensure less distortion in the corners of the image without affecting the centers, and a continuous f/2.8 aperture means this lens is fast. Compared to the Canon EF 16-35mm f/2.8 L II USM Lens. The 16-35 L II is going to be THE lens that many compare to the Tokina 16-28. I spent a lot of time shooting comparisons between the Tokina 16-28mm f/2.8 AT-X Pro FX Lens and the Canon EF 16-35mm f/2.8 L II USM Lens. And from a 16mm f/2.8 image sharpness perspective, it was very difficult to Canon EF 14mm f/2.8L II USM Canon EF 14mm f/2.8L USM Canon EF 15mm f/2.8 Fisheye Canon EF 16-35mm F2.8L II USM Canon EF 16-35mm F2.8L III USM Canon EF 16-35mm F2.8L USM Canon EF 16-35mm F4L IS USM Canon EF 17-40mm f/4.0L USM Canon EF 16-35mm f/2.8L III lens review   Key specifications: Canon EF lens mount F/2.8 maximum aperture 82mm filter thread Ultrasonic AF motor 16 elements in 11 groups Length 127.5mm Highlights Sharpest EF 16-35mm f/2.8L to date Significantly improved edge sharpness Wide f/2.8 maximum aperture for fast paced photography Improved durability with dust and water resistance Potential The Canon EF 16-35 f/2.8L II features ring type USM. There are two types of USM that Canon uses in its L series lenses. The Micromotor based one is the cheaper and the slower of the two. The other one is the ring type USM. This is more expensive but also faster and quieter when focusing. This lens has Full Time Manual focusing (FTM). Canon EF 16-35mm f/4L IS USM (Black) at Walmart for $638. As it’s a full-frame lens, the 108-degree viewing angle of the EF 16-35mm f/4L IS is comparable to using a zoom lens starting at 10mm on an APS-C camera. However, an upside to the Canon EF 16-35mm f/4L IS USM is that its tele end stretches further than many of these competing lenses yn8AG.