is super sharp no matter what you do to it. Works splendidly as a normal and macro lens on FX and film cameras, and as a short telephoto and macro on DX Everything happens internally, so the outside of the lens never rotates or moves while focusing. Used on a DX camera it gives angles of view similar to 90mm lens would give on an FX or 35mm film Manual focus is a breeze - just move the focus ring at any time Excellent Optics 12 elements, 9 groups. Highly advanced internal focus (IF) design with two aspherical and one ED element. Nikon Super Integrated Multicoating, with one element nano crystal coat. This is the world's first professional aspherical macro lens. is super sharp no matter what you do to it Versatile, not limited to extreme close-up, can achieve great results with nearly any subject. Amazing macro,Crisp sharpness from (1:1) to infinity Detailed portraits and more Fast f/2.8 aperture and versatile focal length Works splendidly as a normal and macro lens on FX and film cameras, and as a short telephoto and macro on DX Everything happens internally never rotates while focusing Manual focus is a breeze - just move the focus ring at any time Excellent Optics 12 elements in 9 groups. Highly advanced internal focus (IF) design with two aspherical and one ED element Nikon Super Integrated Multicoating, with nano crystal coat. This is the world's first professional aspherical macro lens. Paid almost $900