There must be a conspiracy between Nikon and Canon not to update this range. The 100-400 and the Nikon 80-400 (is it?). They are both ancient. I'm sure as soon as one updates, the other will follow quickly. Both are only barely serviceable. The Nikon is utter, utter, utter crap, but at least you have the 200-400 option. The Canon isn't utter crap, but it's pretty hit or miss at certain focal lengths. If there were a D300s replacement out in the near-term, I would so carry both brands. I simply must have a 200-400 f4 and Canon has been trying my patience for years—at least four of them.... or is it five?