HOW IT IS CALCULATED
Calculate exposure time with an ND filter
10 stops multiply exposure time by 1024
Instant resultClear formulaRuns locally
01Values
02base shutter × 2^stops
03Result
10 stops multiply exposure time by 1024
Each ND stop doubles required exposure time
This exponential relationship makes strong ND filters produce very long exposures.
02
In short
What logic does the calculator use?
base shutter × 2^stops
Example?
10 stops multiply exposure time by 1024