Adorama has the Tamron SP 150-600mm f/5-6.3 Di VC USD Lens available for preorder.
Adorama is also now accepting Tamron 24-70mm f/2.8 Di VC USD Lens preorders.
The Nikon mount version is also available for preorder.
B&H is accepting preorders for the Tamron 24-70mm f/2.8 Di VC USD Lens (Canon mount).
"Will ship after Thu, Apr 26."