Canon EF 70-200mm f/2.8 L Is USM Lens

The EF 70-200mm F2.8 L IS USM was introduced way back in August 2001 supplementing but not replacing the non-stabilized 70-200mm F2.8 L USM in Canon's highly regarded telephoto lineup. This is a lens which can truly be described as a professional workhorse with robust build including dust and moisture resistance wide F2.8 maximum aperture fast and silent ultrasonic autofocus motor and optical image stabilization for hand-holding at slow shutter speeds. The optical design is somewhere on the far side of complex; it features 23 elements in 18 groups with 4 UD elements to provide compensation for chromatic aberration. According to Canon this gives a 'high-resolution high-contrast optical capability' as demanded from a lens which needs to perform all day every day in the hands of professional photographers across a wide range of subjects and conditions.EF mount; telephoto zoom lens Ultra-low Dispersion glass; image stabilizer; inner focusing; full-time manual focus; circular aperture 70-200mm focal length f/2.8L constant maximum aperture