ND Filter & Long-Exposure Calculator
Work out the new shutter speed after adding a neutral-density filter.
Overview
A neutral-density filter and long-exposure calculator. Give it your metered base shutter speed and the ND filter you want to stack, and it tells you the corrected exposure time, formatted in seconds or minutes:seconds for long exposures. Ideal for smoothing water, blurring clouds and shooting daylight long exposures.