Marathon Runners Crossing Maclay Bridge Missoula, Montana As an early group of marathon runners crossed the historic Maclay Bridge in morning light, I was prepared with my camera in manual exposure mode. An aperture of f/8 gave enough depth of field to ensure everyone in the group was in sharp focus. A shutter speed of 1/320 second was fast enough to freeze their motion as they ran toward the camera. ISO 125 ensured a proper exposure. With these settings all my exposures of the participants were consistent throughout the race. Learn how to select the appropriate shutter speed, aperture and ISO settings in manual exposure mode for your action shots. Join me for Advance Your Digital Photography class beginning September 1, 2026 , at the Lifelong Learning Center in Missoula, Montana. Click here for details and registration.
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