Blur passers-by

Once you’ve set a small aperture (for maximum depth of field) and a low ISO (to minimise noise) your shutter speed will depend how bright the scene is. For Frank’s first Hot Shot, a shutter speed of four seconds gave a good exposure, andwas just fast enough to capture passing pedestrians as blurred shapes. Setting a slightly wider aperture would have enabled a faster shutter speed, which would have made the figures in the foreground a bit more distinct.