From the ManufacturerEF 24-70mm f/4L IS USMThe EF 24-70mm f/4L IS USM is the perfect zoom to complement full-frame DSLRs like the EOS 6D. With 2 aspheric and 2 UD elements, the EF 24-70mm f/4L IS USM delivers high- quality images with excellent detail throughout the entire zoom range. A 9-blade circular diaphragm delivers beautiful, soft backgrounds. It offers a minimum focusing distance of 1.25 ft./0.38m across the entire zoom range and has a macro mode at the telephoto end with up to 0.7x magnification (minimum focusing distance becomes 7.87 in./0.2m) and is easily accessible with a one-touch switch. It features a Hybrid IS system with up to 4 stops of stabilization, compensating for both angular and shift types of camera shake, delivering effective stabilization even in macro. Inner focusing and ring-type USM deliver, fast, quiet AF, and full-time manual focus is available for manual focusing even while in AF mode. The durable EF 24-70mm f/4L IS USM is sealed for excellent dust and water resistance plus has fluorine coating on the front and rear elements reducing smears and fingerprints. Compact and lightweight, it's the perfect L-series lens for photographers on the go. Specifications Focal Length & Maximum Aperture: 24-70mm, 1:4 Lens Construction: 15 elements in 12 groups Diagonal Angle of View: 84º-34º Focus Adjustment: Inner focusing system Closest Focusing Distance: 1.25 ft. / 0.38m Filter Size: 77mm Max. Diameter x Length, Weight: 3.3 x 3.7 inches, approx. 21oz. / 83.4 x 93mm, approx. 600g Sample Image Click here for larger image MTF ChartsProduct DescriptionFocal Length: 24 - 70mm, Diagonal Angle of View: 84 - 34 degrees, Filter size: 77 mm, Closest Focusing Distance: 1.25 feet.