F4 date code: US1009 SOLD 2.8 date code: UV1009 $940 shipped w/paypal I wont sell the 2.8, unless the F4 has sold. But I'm willing to trade both lenses for a Canon 70-200is 2.8L They're both in mint shape, minor scuffs on the hood as usual. The box on the F4 however, is missing a flap. EDIT: The F4 does NOT come with a tripod collar, only the 2.8 does. It's not missing, it just never came with it.