NDTimer: Long-Exposure Calc

NDTimer multiplies your base shutter speed by 2 to the power of stops to give you the required exposure when a neutral-density filter is on the lens.

INPUT MODES
- Stops (6, 10, 16, etc.)
- ND factor (ND8 = 3 stops, ND64 = 6, ND1000 = 10)
- Optical density (OD 1.8 = 6 stops; OD 3.0 = 10 stops)

PRESETS
- Shutter presets from 1/8000 to 30 seconds
- ND presets from ND2 to ND32000 (15 stops)
- Tap to set, no math required

OUTPUT
- Required shutter in plain human format (1/15s, 8s, 2m 13s, 1h 30m)
- All three notations cross-displayed

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