The new “Big Sanyuan” with 15mm ultra-wide angle and IS image stabilizer Canon's dedicated "big three-dimensional" lens for the EOS R series benefits from the optical design flexibility brought about by Canon's independently developed large-diameter RF mount and short back focus distance. It achieves a constant F2.8 aperture L-class wide-angle zoom lens with a 15mm ultra-wide angle and an IS image stabilizer. The entire zoom area has high image quality performance. Not only that, this is also the first Canon constant F2.8 aperture L-class wide-angle zoom lens to feature an IS image stabilizer, with an anti-shake effect equivalent to a maximum shutter speed of 5 steps. The lens adopts a dust-proof and water-proof structure and is coated with anti-fouling fluorine coating, making it highly reliable. Suitable for a wide range of fields such as landscape, architecture and street photography.