Originally Posted by martin_j001
You can use a telephoto lens (usually works best with this too) that has an extremely low aperture opening time (I think that is it--the shutter won't be open very long at all). This allows the camera only to focus on the largest, closest image in the scene, and this will cause the background to be unfocused and "blurred". Its a great effect for fast moving sports though. The pics look great crosscut!!
I don't think that's how it's done. I
think what he does is follow the cyclist with the camera as he goes by, which makes the background blur from the movement while the cyclist stays in focus. Difficult to do well like it has been done here.
Where's the original poster to tell us how it's done? Great pics man, share the secret please?