Canon EF-S 17-85mm f/4-5.6 Image Stabilized USM SLR Lens for EOS Digital SLR's - White Box (Bulk Packaging) Focal length is 17-85mm, aperture is 1:4-5.6 and filter size is 67mm Lens construction is 17 elements in 12 groups Diagonal angle of view is  78 30 ft. - 18 25 ft. Ring USM zoom system Closest focusing distance is 1.15 feet 17-85mm standard zoom lens with f/4-5.6 maximum aperture for EOS digital SLR cameras Image Stabilization system reduces camera shake to extend use in low-light levels Aspheric element and 2 aspherical surfaces deliver excellent optical quality Ring-type ultra-sonic monitor (USM) for superior autofocusing; 1.15-feet close focusing Measures 3.1 inches in diameter and 3.6 inches long; weighs 16.8 ounces; 1-year warranty