100-400mm F/4.0-6.3 LEICA VARIO-ELMAR High-Performance Lens/ Micro Four Thirds Performance/ Mirrorless Design With Portability/ Power I.O.S./ 20 Elements In 13 Groups Lens Construction/ F22 Minimum Aperture/ F4.0(Wide) - F6.3(Tele) Maximum Aperture/ Black Finish