The brand new and highly anticipated Canon EF 100-400 f/4.5-5.6L IS II will begin shipping on Friday, December 12, 2014 from various USA retailers. We expect to see a few start shipping a bit earlier in Asia. We're told initial stock levels are going to be quite high to match the preorder numbers. B&H Photo, Adorama and Amazon all ship preorders on a first come, first serve basis. We've heard reports of sites claiming their preorders get front of the line treatment from the big retailers, which simply isn't true.
The Canon EF 400 f/4 DO IS II is also scheduled to start shipping on Friday, December 12, 2014 from US retailers. We don't know how many of these are going to be out there or how long preorder lists currently are.