I am using a 50 f/1.4 also. I just developed another portrait of a lad taken inside a tourist train across a dining table, so the distace is probably three feet. Part of the background (the distant interior wall of the train car) is near black, with a couple of small spills of light from vents or what have you. The out of focus spots of light are rendered on the film as distinct little hexagons. They are really ugly when blown up. I'd be curious if you see this type of effect from a similar lighting situation.
Originally Posted by bjorke
In looking through my "Only Zeiss" book, I notice they are calling out circular apertures in some of the high-end telephoto glass in an effort to improve the rendering of out of focus areas.