Tamron 100-400mm F/4.5-6.3 Di VC USD Heavyweight performance in a lightweight lens. The Tamron 100-400mm is a highly portable ultra-telephoto zoom with precision AF for shooting instantaneous movement with the utmost clarity. LD glass prevents aberrations common in tele lenses while the eBand coating suppresses ghosting and flare, yielding vivid images with amazing clarity. With a lens barrel made primarily of magnesium, the A035 boasts the lightest weight in its class. Add in its 4-stop VC capability and you have an ultra-tele lens that is ideal for handheld shooting over long periods of time. Moisture resistant construction, fluorine coating, and capability with optional accessories like the Tamron Tap-in Console, 1.4X, and Arca-Swiss compatible tripod mount, round out this impressive new zoom