Bundle Includes: Sigma 18-35mm f/1.8 DC HSM Art Lens for Canon EF, Backpack, Memory Card, Card Reader, Filter Kit. Industry-Leading f/1.8 Aperture Zoom First of its kind, this lens delivers a constant f/1.8 maximum aperture throughout the zoom range, offering unmatched low-light performance and precise depth-of-field control for both stills and video.. Exceptional Optical Clarity Engineered with 5 Special Low Dispersion (SLD) elements and 4 aspherical elements to reduce chromatic aberration, distortion, and fringingensuring tack-sharp, color-accurate images across all focal lengths.. Pro-Level Autofocus & Build Features Sigmas Hyper Sonic Motor (HSM) for fast, quiet, and accurate autofocus with full-time manual override. Constructed with a durable Thermally Stable Composite (TSC) and solid brass bayonet mount for long-term reliability.. Designed for Artistic Expression Part of Sigmas renowned Art series, this lens is built for creative professionals seeking cinematic image