Nikon AF FX NIKKOR 180mm f/2.8D IF-ED prime telephoto Lens with Auto Focus for Nikon DSLR Cameras Lens Construction - 8 elements in 6 groups (1 ED) Picture Angle - 13 degrees 40 minutes Minimum Focus Distance - 5 ft. Maximum Reproduction Ratio (Macro Setting) - 1 - 6.6 Attachment / Filter Size - 72mm