I tested the 35 DX, was very disappointed, have tested various zoom lenses, but no lens was able to satisfy so as the 24er. I use it on the D300 and the autofocus is super fast (much much faster than the newer 35s), the images are super sharp. I think it's extremely small and lightweight, yet high-quality workmanship. I am become a huge friend of fixed focal lengths (50, '85). The 24er I have now more often on it, as my beloved '50s, as it is almost just the human glance winding comes close and I like to use it for things to do in the city.