This is with a Canon 400mm f/2.8 IS paired with a 1D mark IIn. When I shot football in very hot sunny clear sky weather, I get some strange \"swirly\" or double-line bokeh with individual lines in some of the photos. It sort of depends which angle I shoot at (as it seems to appear more on photos where the background includes the audience). I am not shooting behind a net or anything.
I shot soccer last week with the other body (the 1D mark II) in quite similarly sunny but not as hot weather and I didn\'t get this swirly effect. I\'m not sure if the body is what\'s causing it.... probably not. Maybe it\'s the heat waves rising from the grass.
Is this a normal phenomenon. All photos are f/2.8 and around 1/2000 shutter speed on AI SERVO. I used image stabilizer in football but I don\'t remember if I did for soccer. I am using the standard drop-in filter Canon gave me. I read some stuff on IS and bokeh and maybe it has something to do with it? http://www.bokehtests.com/Site/Stabilization_and_Bokeh.html
Sep 05, 2010 at 01:46 PM
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