Sony Alpha 7S II Quick Start Manual page 42

Camera Operations: Depth of Field
• Be aware of how your depth of field changes.
• Larger f-stops openings (the greater numbers) have a greater depth of
field than the smaller f-stop openings (smaller numbers).
• F4 will have a much shallower depth of field than f22. You may only
have a few centimeters in focus with f4, but 30 meters in focus at f22.