Barrel Racer Augusta Rodeo, Montana While photographing barrel racing on a bright sunny day, I needed a fast shutter speed to freeze the horse and rider as they circled the barrel. So I manually chose an f/5.6 aperture to let in the most light possible. This enabled me to set a 1/640 second shutter speed which froze the animal as well as the flying dirt. I also selected ISO 200 to ensure an action-stopping shutter speed. So all my photographs during this event had the same exposure, allowing me to concentrate on the action. When you need to capture fast action and the light isn't changing, manual mode (M on the exposure dial) gives you consistent exposures, no matter the composition. Using an automatic exposure setting, such as Shutter Priority, means every image could be a different brightness as the changing picture content affects the exposure shot to shot. This fall at the Lifelong Learning Center in Missoula, Montana, I'm teaching Advance Your Digital Photography whic...
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