// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
photo.neutral-density-filter Calculator
Calculates the correct shutter speed when adding an ND filter to a given base exposure, accounting for the filter's stop value (ND3 = 10 stops). Long-exposure waterfalls and clouds in daylight require 6–10 stop ND filters — this prevents the guesswork.
Inputs
Base Shutter S
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Nd Stops
Reference formula or conversion factor shown for context.
Iso Base
Reference formula or conversion factor shown for context.
Target Iso
Reference formula or conversion factor shown for context.
Results
new shutter speed (s)
The computed rate of movement or processing.
new shutter speed (mm:ss)
The computed rate of movement or processing.
ND factor (optical density)
A dimensionless multiplier applied in the calculation.
ND designation
The value at the specified point or condition.
stops
Reference formula or conversion factor shown for context.
use case
Reference formula or conversion factor shown for context.