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<blockquote data-quote="paul_b" data-source="post: 542080" data-attributes="member: 15676">Maybe i should of been more accurate with my description, so here it is:Recently I photographed my child's running event for the 1st time. I pre focused on the finish line using manual focus (using a standard kit lens 18-55mm f3.5 to 5.6 and a tripod). I chose to use aperture mode (f8), set the ISO to 400, which allowed the camera to adjust the shutter speed for each shot. However, as expected the shutter speed fluctuated as the available light changed and some of my shots had shutter speeds that were a bit too low/slow and thus a few of the runners were a bit blurred (a bit embarrassing).So next time I’m thinking about using shutter speed mode instead and setting that to the ideal speed that I need to capture the runners, which allows the camera to automatically adjust the aperture and ISO for each shot. Which brings me to my question:Using shutter speed mode, if I’ve pre-focused on the finish line using manual focus (and it will stay there), and the camera starts automatically adjusting aperture values for each shot, does a changing aperture value affect what has been pre-focused on.Many thanks.</blockquote>

[QUOTE="paul_b, post: 542080, member: 15676"] Maybe i should of been more accurate with my description, so here it is: Recently I photographed my child's running event for the 1st time. I pre focused on the finish line using manual focus (using a standard kit lens 18-55mm f3.5 to 5.6 and a tripod). I chose to use aperture mode (f8), set the ISO to 400, which allowed the camera to adjust the shutter speed for each shot. However, as expected the shutter speed fluctuated as the available light changed and some of my shots had shutter speeds that were a bit too low/slow and thus a few of the runners were a bit blurred (a bit embarrassing). So next time I’m thinking about using shutter speed mode instead and setting that to the ideal speed that I need to capture the runners, which allows the camera to automatically adjust the aperture and ISO for each shot. Which brings me to my question: Using shutter speed mode, if I’ve pre-focused on the finish line using manual focus (and it will stay there), and the camera starts automatically adjusting aperture values for each shot, does a changing aperture value affect what has been pre-focused on. Many thanks. [/QUOTE]

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