Quote Originally Posted by Leigh B View Post
Hi Sirius,

Your shutter speed is too slow. Go back and read my post #4.

You must use a shutter speed fast enough that the shutter aperture is a moving slit.

- Leigh
I tried 1/30s, 1/25s, 1/20s, 1/15s, and 1/10s multiple times slowly panning cars move 50mph perpendicular to me at about 40 feet away using a 7 1/2" lens.