With its fixed 85mm focal length and wide f/1.2 maximum aperture, the RF 85mm F1.2 L USM lens is ideal for photographing portraits, weddings, fashion and more, and great for low-light situations and producing beautiful, soft backgrounds. It has a noticeable improved autofocus speed from The EF version of this lens, and works great with the eye detection AF feature found in the EOS R and EOS RP cameras to provide impressive focus on a subject's eye. All this and more, including blue spectrum refractive optics (BR) to help reduce chromatic aberration and air Sphere coating to help minimize flaring and ghosting, combine to give you a lens you'll want among your favorites