50-400MM F/4.5-6.3 DI III VC VXD LENS FOR NIKON Z BUNDLE INCLUDES: Flower-Shaped Hood Front Lens Cap Rear Lens Cap Filter Kit Lens Case Lens Cleaner EXTENSIVE 50-400MM ZOOM RANGE: This significant zoom range offers exceptional versatility. Starting at a standard 50mm, it can be used for portraits and general photography. VARIABLE MAXIMUM APERTURE (F/4.5-6.3): The maximum aperture varies with the focal length. It starts at a reasonably fast f/4.5 at the 50mm end and gradually narrows to f/6.3 as you zoom towards 400mm. DI III (DIGITALLY INTEGRATED) DESIGN: Tamron's 'Di III' designation indicates that the lens is specifically designed for full-frame mirrorless camera systems.