Zone System

The scale between pure Black and Pure White.

Pure Black

Middle grey

Pure White

Zone system is divided into 11 zones the distance between the zones is one stop and one exposure value:

Zone 0 Pure Black

Zone I

Zone II

Zone III

Zone IV

Zone V Middle Grey

Zone VI

Zone VII

Zone VIII

Zone IX

Zone X: Pure white

1 Exposure Value:
One F-stop for appirtue
Half or double the shutter speed
Half or double the ISO