Focal Length: 12-24mm Maximum Aperture: f/4 Picture Angle (Nikon Digital SLR): 99-61 degrees Lens Construction: 11 elements in 7 groups Lens Drive: Silent Wave Motor Extra Low Dispersion (ED) Lens: 2 Elements Aspherical Lens: 3 Elements Focusing: Internal Focusing (IF) Type Minumum Shooting Distance: 11.8 in Maximum Reproduction Ratio: 1:8.3 Minimum F Stop: 22 Aperture Blades: 7 blades (rounded) Aperture Ring: NA Lens Hood: HB-23 (Supplied) Filter Size: 77mm Case: Soft case CL-S2 (Optional) Dimensions (Diameter x Length: Approx. 3.2 in x 3.5 in Weight: 1.07 lbs Included Accessories: HB-23 Hood, 77mm lens cap, rear cap