The Sigma 150-600mm F5-6.3 DG DN OS Sports is a mirrorless telephoto zoom lens for L-mount cameras, built natively for full-frame mirrorless with a high-speed linear AF motor and 5-stop optical stabilization. It features 25 elements in 19 groups and a dust- and splash-proof construction. This is the latest-generation Sports telephoto in Sigma's DN mirrorless lineup.