Panasonic Lumix S Series PRO 70-200mm F/4 (L-Mount) LEN1221

L-Mount Lens/Full-Frame Format Aperture Range: f/4 to f/22 One UED Element, Three ED Elements One Aspherical Element, One UHR Element Dual AF System: Linear & Stepping Motors Optical Image Stabilizer Weather-Sealed Construction Removable, Rotating Tripod Collar Rounded 9-Blade Diaphragm