15-30mm Focal Length/ F/2.8 Maximum Aperture/ 18 Elements In 13 Groups Optical Construction/ 9 (Circular Diaphragm) Aperture Blades/ F/22 Minimum Aperture/ 4.5 Stops (TELE) (CIPA Standards Compliant) Image Stabilization/ AX (Anti-Reflection eXpand) Coating/ Fluorine Coating/ Moisture-Resistant Construction/ Compatible With Canon/ Black Finish