It’s been in development for a while, but now Tamron have officially announced the 100-400mm f/4.5-6.3 Di VC USD (model A035) lens. It’s an ultra-telephoto for full frame Nikon and Canon DSLRs. It comes with built in vibration control offering up to 4 stops of stabilisation. Handy when you’re at 400mm.
Tamron boast that the new lens is “the lightest in its class”, while offering fast and precise autofocus performance. It features magnesium alloy components to reduce the weight while keeping strength. It’s also weather and dust sealed, with lens coatings designed specifically to protect against dust, dirt and smearing.