Quote Originally Posted by David A. Goldfarb View Post
In that image, though, the appearance of the out of focus highlights in the background (the foreground is different) isn't only caused by the shape of the aperture. If it had a perfectly round aperture you might still find it distracting, since the out-of-focus highlights are brighter at the edges than they are at the center, though not extremely so I would say. I've seen worse cases. It's more important, I think, that the center of the highlight points be brighter than the edges, and then the shape won't matter as much, and that's an optical design issue.
I bought a 200 f 4 Q auto that had bad blades. tore them out and shoot it wide open now in manual mode, no blades no shape.
the other option is to avoid those conditions that light up undesirable effects in the lens... you learned that in your first day of class right?