Nikon Canada AF-S NIKKOR 180-400mm f/4E TC1.4 FL ED VR is a Professional Super-Telephoto Zoom Lens for Sports and Wildlife Photography with Built-In 1.4X Teleconverter Which Can Be Easily Engaged at the Flick of a Switch: Very Fast Subject Capture & Locked-On Tracking, Lightweight, Durable, Advanced Weather Sealing