Originally Posted by
Adrian
. . . The Tamron will take some getting used to . . . The Tamron is an extending zoom and the zoom action is quite stiff. It is not very easy to alter the zoom on the fly, when compared with the buttery smooth action on the 70-200 f2.8L Canon. This means that when dealing with moving targets, framing the image is not easy.
We have never had a really long focal length lens before, and the 600mm translates to 960mm on the 70D. This creates a very narrow angle of view, making grabbing shots of moving wildlife quite hard. Clearly there are technique issues here as neither of us is used to panning, or framing the shot with both eyes open, so the one eye off the viewfinder is effectively steering the camera.