The Samyang AF 24-70mm F2.8 is a versatile, full-frame, weather-sealed AF lens designed for Sony mirrorless cameras. It offers a wide angle of view and a bright maximum aperture of F2.8 throughout the zoom range, making it suitable for both video and still photography. The lens features a Linear STM stepping motor for fast, quiet, and accurate focusing. Its weather sealing protects against dust, rain, and snow. Key features include an aperture range of F2.8 to F22, 17 elements in 14 groups optical construction, and special lenses like ASP 2, H-ASP 1, and HR3. It's ideal for professional photographers, video creators, and commercial productions demanding high resolution and smooth autofocus. The lens is optimized for video with PAR-FOCAL capabilities for consistent sharpness, CINEMATIC VIDEO AF for smooth recordings, and LINEAR MF CONTROL for a manual focus feel. It also includes a programmable custom switch and an ergonomic aluminum housing with weather protection. The autofocus is video-optimized and uses a quiet linear STM motor.