The Nikon AF-S Nikkor 400mm f/2.8 D ED-IF II is a professional-grade super telephoto prime lens engineered for serious sports and wildlife photographers. This compact powerhouse features a bright f/2.8 maximum aperture for superior low-light performance and exceptional shallow depth of field control, along with three Extra-Low Dispersion (ED) glass elements that minimise chromatic aberration and colour fringing. Powered by Nikon's Silent Wave Motor autofocus system, it delivers quiet, high-speed focus acquisition with full-time manual override and M/A mode for seamless switching between AF and MF operation. The internal focusing design maintains a constant barrel length for stable tripod mounting, whilst the magnesium die-cast construction keeps weight down at 4800g. With a minimum focus distance of 3.5m and a removable rotating tripod collar, this discontinued model remains a sought-after choice for professionals seeking exceptional optical performance at a lower price point than newer VR variants.