Sigma 200mm F2 DG OS Sports: First Impressions for Portrait Photography Sharpness, speed, and unbeatable ruggedness. The Sigma 200mm F2 DG OS | Sports lens is a professional-level lens that shines in any use case, but for photographer Keydrin Franklin, it’s the perfect portrait lens. See how he uses this ultra-fast telephoto prime to capture his subjects in their very best light. #Sigma #Sigma200mmF2Sports #MadeInAizu #photography #portraitphoto