1) Landscape - Canon 17-40
2) Portrait - Canon 50mm f/1.8
3) Children (yes, they're in a category of their own) - Something water- and bullet-proof
4) Macro (would you choose a short or long macro lens, e.g. 60mm or 120mm) - Sigma 150mm f/2.8
5) Architecture - Canon 10-22
6) Water scene -
17-40 again, depending on what sort of scene
7) Sports + Action - Either Canon 70-300 IS or 300mm f/4L IS
8) Animals + birds - As above
9) Low light or night photography - Nifty 50 again
10) All purpose photography - Tamron 18-200
11) Doorstop - Sigma 600mm mirror
