7.5mm (35mm equiv.), f/8.0, 1/5s, ISO500
Slow sync Flash, +2ev
One guy told me that his brother knew a little trick to make the portrait shot has a spinning background. He didn't know how his brother did it, but I told him that I can guess the technique.
Quickly I whipped out my S90, and made the shot. Well, to make a perfect shot, more samples must be taken. This was just made with one shot!!
He was impressed, and told that's exactly what he say his brother did.