The Rf24-105mm F2.8 L Is Usm Z is the world's first 24-105mm focal length lens combined with consistent f/2.8 aperture. With its constant f/2.8 max aperture, full-frame coverage, and its ability to zoom past the traditional 70mm roadblock to a true portrait-length 105mm, this lens is an incredible standard zoom solution for many different applications. An optional, dedicated Power Zoom Adapter Pz-E2 transforms the video operation possibilities with its smooth and versatile zooming. Even in low light, this lens will excel for weddings and events, photojournalism, portraiture, studio work, and video creation.Outstanding Optical Performance with Consistent f/2.8 Maximum ApertureBy taking advantage of the large diameter RF mount and short back focus, the RF24-105mm F2.8 L Is Usm Z is able to achieve a maximum aperture of f/2.8 throughout its entire zoom range.