The AF-S NIKKOR 400mm f/2.8E FL ED VR Lens from Nikon is an advanced telephoto lens featuring a bright, fast f/2.8 maximum aperture to benefit its use in difficult lighting conditions. The lens construction incorporates two fluorite elements and two ED (extra-low dispersion) elements, which help to minimize the overall lens weight and significantly reduce chromatic aberrations throughout the aperture range. Also improving image quality, a Nano Crystal Coat has been applied to lens elements to minimize ghosting and lens flare for maintained image contrast, clarity, and color neutrality. Protecting the advanced optical design is a front fluorine-coated meniscus glass element that, when paired with the weather-resistant magnesium alloy barrel, supports working in inclement conditions.