What are your general opinions about the major lens lines' bokeh (Nikon, Schneid er, Rodenstock and Fuji)? I like pictures with out of focus areas in them. How ever I hate those bright circles you can see when a picture has some tree in the background with strong backlight. If I buy a lens I would rather not have this flaw. Please state lenses with goo d bokeh as well as lens with bad out of focus characteristics. Thanks.