 Alvin C. Lopinot |
what are circles in the background of a photograph What are the circles found in the background of some images called? What causes them. I have heard they represent the aperture caused by some highlights.
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pcmlphotography.com - Pamela C.M Lammersen Contact Pamela C.M Lammersen Pamela C.M Lammersen's Gallery |
Hello Alvin, with out seeing the image you are talking about I am guessing that what you are meaning is 'the circles of confussion' that is the effect caused by using a short depth of field or smaller F-stop. The smaller the F-stop, the less distance(short DOF) in the image will be focused. the larger the F-stop, the greater(long DOF) distance in the image will be focused. You should do some experimenting with your camera and see the effects - different lenses etc will have different effects because of focal length and such, but depth of field is a fun area to play around with. hope that helps. - pamela
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Bob Cammarata |
(See enclosed example.) A wide aperture will show circles, and when you stop-down you get hexangonal shapes.
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