Canon EF-Mount/Full-Frame Format/ 70-200mm Focal Length/ F/2.8 Maximum Aperture/ 23 Elements In 17 Groups Optical Construction/ 37.4 " Minimum Object Distance/ 1:6.1 Maximum Magnification Ratio/ 77mm Filter Size/ 88mm Maximum Diameter/ 9 Aperture Blades/ F/22 Minimum Aperture/ VC Image Stabilization/ Dust And Moisture-Resistant Construction/ Black Finish