Hi Phil, the overall shot/crop/composition is very good. You may have given some consideration to the rule of thirds though, depending on what you wanted to highlight(i.e. the water or the swan's head) The only thing lacking is the loss of detail, sharpness, contrast in the swan's head. The inner circle of the water seems sharper than the swan's head and therefore the eye goes there more than the swan.
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{K:163889} 6/29/2006