Long Exposure Guide: ND Filter Calculator
Neutral Density (ND) filters are sunglasses for your lens. The **ND Filter Calculator** at **Online Tool Base** helps you determine the correct shutter speed when using heavy filters (like a 10-stop 'Big Stopper'). These filters block so much light that your camera's meter often fails or cannot calculate beyond 30 seconds.
If your base shutter speed is 1/60th of a second and you add a 10-stop filter, your new shutter speed becomes 16 seconds. **onlinetoolbase.online** does this math instantly. It enables you to capture silky smooth water or motion-blurred clouds without under or over-exposing the image.
Why Use This Tool?
Mental math with powers of 2 (2, 4, 8, 16, 32...) gets hard in the field. A 6-stop filter isn't 6x darker; it's 64x darker. This tool provides a simple lookup table and calculator to ensure you nail the exposure on the first try, saving battery and time.
Key Features
- Filter Names: Supports 'Stops' (10-stop), 'Optical Density' (3.0), and 'ND Number' (ND1000).
- Timer Mode: Built-in countdown timer for Bulb exposures > 30s.
- Stacking: Calculate combined strength of two filters.
How to Use
- Meter scene without filter (e.g., 1/125s).
- Select your ND Filter Strength (e.g., 6 Stops).
- See the new Shutter Speed (e.g., 0.5s).
- Set camera to Manual and shoot.
Technical & Privacy Note
Helper app. The **ND Filter Calculator** from **Online Tool Base** runs locally. No data collection.