Right now I have:
50mm 1.4
16-35 2.8L II
24-105 4L IS
100-400 4.5-5.6L IS
I'm wondering what lens to get next. I'm thinking maybe 70-200 f4L IS for backpacking (1/2 the weight though also 1/2 the zoom of the 100-400). Or maybe the 100mm L macro. Or the 8-15 fisheye zoom. Or another prime. I can't decide.

