-1 said:
I've checked a mass of test sites and thinks that the 70-300L should upgraded soon, it's a ”L” after all.
Like the 34L2 :-> ... no, really, L lenses are about *not* being updated like Rebels unless there's a very good reason for it - Canon is rather reliable on protecting their customer's investment in premium gear.
Canon already have the more expensive 70-200L/2.8 and the new 100-400L2. That's one reason why I don't see a reason at all to "update" the 70-300L. If there are to be significant improvements, it would probably end up being bigger, heavier and certainly more expensive - so it would be losing the appeal it currently has.
-1 said:
The combo 70-200 plus TC seem to yield better results at aprox 300
So what? Did you check the price, weight and length of this combination? And you'll get better iq form a 300mm prime still.