I will be going whale watching on the weekend with the 7D. My questions revolve around,choice & .
I do not have a mono-pod but may try and get one before the weekend.
As I will be on a rocking, rolling boat, what sort of should I aim for?
To make it more complicated I have to choose from a 70-200F2.8 IS or 100-400F4.5-5.6 IS.
If the whales are breaching etc I am thinking I will need about 1/250th if the weather is Ok and boat not rolling too much. Otherwise about 1/500th.
Any advice would be great.