Another thought

I guess I should let you all know the equipment I am using:

EOS 1Ds MarkII
EOS 5D
EF 16-35 f/2.8 USM
EF 24-70 f/2.8 USM
EF 70-200 f/2.8 IS USM
EF 28-300 f/3.5-5.6 IS USM
EF 400 f/2.8 IS USM
Speedlight 580EX