Precision exposure compensation for large format macro photography.
When extending bellows for macro work, light intensity at the film plane decreases as distance increases. Use these values to adjust your shutter speed or aperture to avoid underexposure.
Stops to Add
EV adjustment required
Exposure Factor
Multiplier for time
| Ratio (Ext/FL) | Factor | Stops |
|---|---|---|
| 1.2x | 1.44x | 0.5 |
| 1.4x | 2.00x | 1.0 |
| 2.0x | 4.00x | 2.0 |
| 3.0x | 9.00x | 3.2 |