I recently got a 100/4 Zenzanon E macro lens. After shooting a few rolls I think it's a decent performer. There was a shot of a flower on my last roll. The flower is an azalea and there is a bush behind it. The flower itself is sharp but behind it is what looks like swirling bokeh. In the past I have only seen this with zoom lenses. Has anyone else seen swirling bokeh with this lens? Does the newer 105 macro also show this?