Strange,isn't it? Some art photogrphers pay almost as much attention
to the fuzzy out-of-focus portions of their photographs as they do the clear central parts of their images. I won't attempt to explain it in detail as any really interested photographers can find more than I know elsewhere on the Internet. Seems that after you set your
camera lens on a given distance in front of the camera - that will be the part of the subject which looks clear and distinct. The other parts of the picture, closer and farther away, (usually) will be
unclear and look like various irregular blobs. A high quality lens
(read "expensive"?) should create nice round blobs that blend into the background without distractions (pleasant bokeh). A bad lens on the other hand, may produce blobs that resemble triangles, little
donuts and other odd shapes (bad bokeh). Sort of a wierd concept but
it really happens. You might like to check it out. TT