escala de profundidad de campo de visión
/eskˈala ðe pɾˌofundiðˈad ðe ˈkampo ðe βisjˈon/
n
English: depth-of-field scale · 景深标尺
Significado：Scale that shows the zone of sharpest focus around the subject; this is a function of the diaphragm’s opening and the distance between the lens and the subject.