bellsie
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Posts posted by bellsie
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I do a lot of sports photography with a Canon 7D and a 70-200 L series USM lens. I am using a single autofocus point (dead centre of the frame) but even when I have it covering the subject the image is sometimes out of focus. Its not a shutter speed issue as I never use speeds below 1/1000th sec for this type of shot, aperture f2.8 and ISO usually 400 or 500 . I use the Canon DPP4 editing software which shows the focus point(s) on each photo. The out of focus shots have the subject covered by the focus point yet they are fuzzy. Should I have the camera / the lens checked over or is there something wrong with my technique?
Focus problem
in Sports and Action
Posted
Thanks everyone for your replies. I went for the max aperture to create the bokeh effect but I expect I will still get it to some extent by stepping down. The distance to the subject is usually between 10 and 50m. Covering a whole shinty pitch (180 X 80m) isn't doable with a 200m lens so i tend to stick to around a 50m max. I am noticing that even though the subject at the focus point shown by the editing software is actually out of focus, 30m further back is sharp. I wonder if I haven't given the camera enough time to find the focus before pressing the shutter all the way? Either that or I have pressed the shutter half way while swinging the camera to latch on to the moving subject and have actually focused on something else? You have certainly given me plenty to think about, thanks. Couldn't put any examples up as they seem to be too big.