<p>The new Canon 100-400 may seem pricy at $2200 but it is, I believe, $500 less than the Nikon 80-400. Seems like Nikon may be shooting themselves in the foot with the new 200-500 $1300 less than the 80-400. On the other hand, I own both the new Canon 100-400 and the Tamron 150-600 because the 100-400 is smaller and lighter to carry, focuses to 1 meter and, with a 1.4x converter, gives me a 140-560 f8, which is better than not having a long lens with you.</p>