60mm macro lens with f/2.8 maximum aperture for EOS digital SLR cameras 25-degree angle of view is equivalent to 96mm lens on 35mm camera Flat-Field Focusing w/ Circular Aperture Floating optical system can focus down to life-size 1:1 magnification Silent and powerful ring-type ultra-sonic monitor (USM) for autofocusing Measures 2.9 inches in diameter and 2.8 inches long; 1-year warranty Measures 2.9 inches in diameter and 2.8 inches long , 1-year warranty Inner Focusing w/ Floating Elements Fast Ring-USM Autofocus Full-Time Manual Focus Override Canon Super Spectra Lens Coatings