Renowned for its quality. I have one to go with my FX-3, which makes up for a very nice and lightweight system. I can't complain about its sharpness, I think it is a very fine lens. The best advise is to use this list and check the measurements when buying second-hand telephotos. New compact version.
Telephoto See the warning about design enhancements in the previous section.
4,6,8,10 Old version. New compact version. A nice piece of glass. It's not very big, it feels rugged, and I think the lens is quite sharp. As usual, it is dead cheap.