The zoom is set to 28mm and aperture is F3.8. Then, the flash-subject distance is 9m which is about 30 ft. The next one is the Sunpak PZ5000 AF's back panel. It shows the flash is in the M mode with ISO speed 100, focal length 50mm, aperture 8.0, and flash-subject distance 13 ft. Do not worry.
Most flashes have a table like the one shown below.
The intersection point provides you with the desired flash-subject distance or aperture.