ND filter decisions in the field.

Save the filters you carry, target the shutter speed you want, and get a practical long exposure stack without doing stop math on location.

StopStack app icon
Base 1/15s ยท f/11 ND Stack ND64 + ND8 Target 34s

Your filter kit

Add ND8, ND64, ND1000, CPL, or custom stop values so recommendations match the gear in your bag.

Target shutter planner

Work backward from a creative target like 4s water or 30s cloud streaks and see the best available stack.

Long exposure timer

Start a visible countdown for longer exposures and know when the result needs Bulb mode.