Sigma 135-400mm f/4.5-5.6 APO DG SLD Telephoto Zoom Lens for Olympus and Panasonic Digital SLR Cameras Compact ultra-telephoto zoom lens ideal for sports, nature, wildlife, and landscape photography Multilayer coating and design reduce flare and ghosting One aspherical lens and three SLD glasses for excellent correction of chromatic aberration Rear focusing system ensures high performance stability and ease of use Removable tripod collar included; zoom hood keeps out extraneous light harmful for image quality