braduardo wrote in post #2072431
It seems that you expect an aweful lot from your lenses. Far be it from me to complain about a 400mm L with IS that you don't need a truck to haul around NOT being able to use a TC and keep AF. Isn't the 400mm prime like 3-4 times the price?
I expect them to be sharp at the focal lengths I use them for - the one I rented was not. And since I lose AF with a teleconverter, I might as well use an FD lens - the FD 85-300 almost replicates the 100- 400 (107-378 with the 1.26x of the FD-EOS converter), and I typically have it on a monopod so IS is not required.
The EF 400 f5.6L is actually less money than the 100-400, and it is a very portable lens. Since I used the 100-400 mostly at 400mm, the prime is a much better choice for my use. In fact, I bought a refurb EF 35-350 L from B&H, and that really makes a better choice for me as a walkaround lens for motorsports than the 100-400, despite no IS. It also put the FD 85-300, a fine lens in its own rite, back into my bag.
I have my suspicions that I rented a bad copy. But I hear the - soft at 400mm - from several folks here. Someone above even mentioned - I wish it were f4, non-push/pull, and sharp at the long end - Gee, all this from an L lens?
As I said, I'll wait for an upgrade. In the meantime, I think I have the 100-400 covered.
Have Fun,