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What you are seeing is a function of shallow depth of field, meaning, only a small portion of the scene is in focus. A few things effect depth of field: 1. Aperture - the wider the aperture, the depth of field is shallower. 2. Distance to the subject - the closer you are to the subject, the depth of field is shallower. 3. Focal Length - the longer the focal length, the depth of field is shallower.
Canon 85L @ f/1.2: