From Wikipedia:"In optics, particularly as it relates to film and photography, the depth of field (DOF) is the portion of a scene that appears acceptably sharp in the image. Although a lens can precisely focus at only one distance, the decrease in sharpness is gradual on each side of the focused distance, so that within the DOF, the unsharpness is imperceptible under normal viewing conditions."

What I can interpret through some pictures. # Vini Card in Focus, Rotui Bottle of Juice and Batteries in Background.

At F/1.2:

At F/16:

# Rotui Bottle of Juice in Focus, Vini Card and batteries in foreground.

At F/1.2:

At F/16:

Here is the series of shots taken from Aperture of F/1.2 to F/16 with Canon 50L, click > here <.