100-400mm Focal Length/ F/4.5-6.3 Maximum Aperture/ 17 Elements In 11 Groups Optical Construction/ 1.5m Minimum Object Distance/ 1:3.6 Maximum Magnification Ratio/ 67mm Filter Size/ 9 (Circular Diaphragm) Aperture Blades/ Moisture-Resistant Construction/ Fluorine Coating/ For Canon Cameras/ Black Finish