The Olympus M.Zuiko 100-400mm F5-6.3 IS offers an equivalent focal length range of 200-800mm, making it perfect for casual wildlife and motorsports photography. We took it to the track, to see how it performs. This is sponsored content. Learn more: DPReview.com/sponsored ----------------------- DPReview.com is the world's largest digital camera review website. Welcome to our YouTube channel! Subscribe for new feature videos, reviews, interviews and more. Discover the world's most in-depth digital camera reviews at http://www.dpreview.com/