4. The Tech Details
Considering that everyone is moving quickly, a fast shutter speed is
essential for sharp results. At 1/250th of a second, you can freeze the
motion of all who pass by. This will also help to prevent any camera
shaking. Then, to effectively bring attention to the subjects and throw the
background out of focus, use a wide aperture such as f2.8 or f4. Start at the
lowest ISO (100) and raise it accordingly based on the existing light.
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