Obviously, the Nikon 600mm f4 ED AI-S Nikkor is a very large lens: this is a fast, professional supertelephoto that's best used on a tripod. It's also in excellent condition, with only minor cosmetic wear and very clean glass. Pros put real miles on superteles like this, so seeing one in this sort of condition is nice. Picture quality is excellent, as you'd expect. Includes Nikon hood, hardcase, and TC-301 2x teleconverter. The teleconverter makes this a 1200mm f8 lens, which is pretty sweet.  Before you jam that "add to cart" button, please note that this is a manual focus lens.