This Sigma EX lens is a great choice for anyone looking to upgrade their photography gear. With a maximum aperture of f/5.6, it's perfect for capturing sharp and clear images. The lens is compatible with Nikon AF mounts and has both auto and manual focus options. The 400mm focal length provides a telephoto and aspherical view, making it ideal for capturing distant objects. The lens front is compatible with 72mm filters, and the mount is designed for easy installation. Whether you're a professional or amateur photographer, this lens is a great addition to your collection.