Eleven Zones
Ansel Adams and Fred Archer developed the Zone System around 1939 to 1940. It connects subject brightness, negative density, and print tone.
The scale runs from Zone 0 to Zone X in Roman numerals. In this scale, one zone is one stop.
| Zone | Print value | What it is for |
|---|---|---|
| 0 | Maximum black | No detail at all |
| I | Near black | First tone above black |
| II | Very dark | First suggestion of texture |
| III | Dark | Textured shadow: standard shadow detail |
| IV | Medium dark | Open shadow, dark foliage |
| V | Middle grey | 18 per cent reflectance, what a meter assumes |
| VI | Medium light | Average light skin in sunlight |
| VII | Light | Textured highlight: pale skin, light fabric |
| VIII | Very light | White with slight texture |
| IX | Near white | White without texture |
| X | Paper white | Specular reflections |
Detail is readable only from Zone III to Zone VII.
Placing and Falling
This method requires two steps:
- Placing. A light meter assumes every reading is Zone V. To move a tone, adjust exposure. Placing a jacket on Zone III means giving two stops less exposure than metered. Placing is your creative choice.
- Falling. After placing one tone, other scene values fall into place naturally. If the jacket is on Zone III and a wall is four stops brighter, it lands on Zone VII. Falling is a fixed measurement.
You place one value and let the rest fall. Photographers usually place shadows first. Underexposed shadows lose detail permanently, whereas bright highlights can be controlled later during development.
Common pitfall: treating the system as mere careful metering. It is about previsualising the final print and setting exposure to achieve it.