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 Canon 20/2.8 USM, 17-40/4 L, 16-35/2.8 L II and 16-35/4 L IS. bigger. NEW: Canon Ultrawide Lens Sharpness Comparison. Canon Ultrawide Lenses Compared . Recommendations top. Intro Specs Performance Compared Recommendations More. This 20mm is an excellent lens, often overlooked because most people can't look past big, heavy expensive zooms. The closest alternative to the RF 15-35, the EF 16-35 f/2.8L III USM, is a fraction cheaper than the RF alternative. The EF 16-35 f/2.8L II USM, which is a lot cheaper, does not deliver comparable image quality. All in all, the RF 15-35 looks like a bargain. The only thing I dislike about it is it has too large a diameter. 1. Canon EF 16-35mm f/2.8L III USM Lens. Canon's Best Ultra-Wide Zoom Lens. The EF 16-35mm f/2.8L III USM Lens is the Canon wide-angle zoom lens you want. This professional-grade lens is the perfect choice for a wide variety of uses, and the image quality it creates is impressive. The lens is well built and includes weather sealing. Canon also has simpler distortion, (but both needs correction anyway). From what I know, the 17-35/2.8 is slightly inferior opticaly to 17-40/4, but of course the 2.8 is nice and it can be bought cheap. the 17-40 is a decent lens, but I'm afraid, that for a real upgrade, you have to go for either 16-35 mkI or mkII. ‎Canon EF-Mount DSLR : Mounting Hardware ‎EF 16-35mm f/2.8 L III USM,LENS CAP E-82II,LENS DUST CAP E,LENS CASE LP1222,LENS HOOD EW-88D,Instruction manual,Warranty card : Number of items ‎1 : Standing screen display size ‎1 Inches : Colour Screen ‎No : Image stabilization technology ‎Optical : Minimum diaphragm opening ‎22 : Min The EF 16-35mm f/2.8L II USM Lens from Canon is a high performance, water-resistant, ultra wide-angle L-series zoom lens. An f/2.8 maximum aperture is effective in low light situations and offers shallow depth of field focus control. The optical design has been improved to offer better edge-to-edge image quality. A 21st century update to a popular and widely used fixed focal length lens, the Canon EF 28mm f/2.8 IS USM is a fixed focal length wide-angle 28mm lens equipped with Canon Optical Image Stabilizer technology, superb image quality and performance perfect for use in any number of photographic applications. Sharp, clear images are easy with an 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 Canon calls this the Canon Zoom Lens EF 24-105mm f/4 L IS USM. EF: Electronic Focus. All modern Canon lenses do this: a motor in the lens does the focusing. L: Expensive as L. No technical meaning other than being Canon's lingo for lenses with extra durability and weather sealing. L lenses work on all cameras including film and full-frame LUMg.