What's going to replace it?
This is rumor and opinion in regards to the 100-400 replacement. I had a chat with a friend today and he gave his 2 cents about the new 70-300 and the 100-400.
What if the new EF 70-300 f/4-5.6L IS is in fact the new 100-400? Since we're dealing with crop factors now. The new lens costs $100 more than the 100-400 does at B&H.
We've heard about a replacement of the 100-400, but what if it isn't a direct focal length/f-stop replacement?
The first thing that comes to peoples minds is a 200-400 f/4L IS. While a fabulous lens from Nikon, it's expensive. How many $6000 lenses are they going to sell?
I can see a 100-500 of some aperture in the $3000-$3500 range. It would require a focal length longer than 400mm to make it a worthwhile “upgrade” over the new 70-300.
It was an interesting conversation and I think there could be something to the concept.