Imagine a lens with a built-in 1.4X teleconverter, up to 4 stops of vibration reduction, advanced dust and moisture sealing, internal focusing, and the ability to easily extend to an exceptionally wide focal length (from max 400mm to 560mm, or as long as 840mm on a DX format camera) with the flip of a switch. Built for the sports, event, nature, and wildlife photographer, the integration of the teleconverter in the lens means that imaging excellence is optimized in terms of light transmission and edge quality. When combined with advanced Nikon cameras like the D850, outer areas of the frame can be used as cross-type sensors, further enhancing acquisition speed and quality.