Zone System Reference
Ansel Adams' Zone System for precise exposure control. Visualise tonal values and calculate exposure placement.
Zone placement calculator
Calculate exposure adjustments for placing subjects in specific zones
Your meter reads Zone V (middle grey). Select the zone you want your subject to appear as:
Zone 5: Middle grey
Middle grey: clear north sky; dark skin, average weathered wood.
~18% reflectance • 0 stops from middle grey
Exposure adjustment
No change
Use the metered exposure as-is
Example: Your meter reads f/8 at 1/125s for a shadow area. Use the metered exposure directly — the subject will render as middle grey.
Complete zone reference
All 11 zones from black to white
| Zone | Value | Name | Description |
|---|---|---|---|
| 0 | Pure black | Pure black: no detail. | |
| 1 | Near black | Near black, with slight tonality but no texture. | |
| 2 | Textured black | Textured black; the darkest part of the image in which slight detail is recorded. | |
| 3 | Dark shadow | Average dark materials and low values showing adequate texture. | |
| 4 | Shadow | Average dark foliage, dark stone, or landscape shadows. | |
| 5 | Middle grey | Middle grey: clear north sky; dark skin, average weathered wood. | |
| 6 | Light tone | Average light skin; light stone; shadows on snow in sunlit landscapes. | |
| 7 | Light grey | Very light skin; shadows in snow with acute side lighting. | |
| 8 | Textured white | Lightest tone with texture; textured snow. | |
| 9 | Near white | Slight tone without texture; glaring snow. | |
| 10 | Pure white | Pure white: light sources and specular reflections; paper white; no detail. |
Understanding the Zone System
The Zone System, developed by Ansel Adams and Fred Archer, is a technique for controlling exposure and development to achieve precise tonal control in black and white photography.
Key principles
- Expose for shadows: Place important shadow detail in Zone III or higher
- Develop for highlights: Adjust development time to control highlight density
- Previsualisation: Decide before shooting where each tone should fall
The metering principle
All light meters are calibrated to produce Zone V (middle grey, 18% reflectance). Whatever you point your meter at will be rendered as middle grey unless you adjust the exposure.
- Meter a shadow → close down 2 stops to place it in Zone III
- Meter Caucasian skin → open up 1 stop to place it in Zone VI
- Meter snow → open up 3 stops to place it in Zone VIII
N-development
"N" is normal development. N+1 increases contrast (expands highlight separation), N-1 decreases contrast (compresses highlights). This allows you to control the final tonal range of your negative.
Log your zone placements with Silverlog
Coming soon