Effective September 2026. NDFilterCalculator provides free informational shutter-speed calculations and a countdown timer for long-exposure photography.
This tool is for general photography planning purposes only. It does not meter your scene, verify exposure accuracy, or account for equipment-specific factors like filter color cast or reciprocity failure. Always confirm exposure with a test shot.
Results are provided "as is," without warranty of any kind. We are not liable for missed shots, incorrect exposures, or any other outcome resulting from use of this calculator or its timer, including screen wake lock failures on unsupported devices.
Don't scrape, resell, or misrepresent the service.
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