ND Filter Calculator

BySteven February 13, 2025September 14, 2025

To calculate the final shutter speed ( $FS$ ) when using an ND filter, multiply the base shutter speed ( $BS$ ) by $2^n$ , where $n$ is the number of stops reduced by the ND filter.

The ND Filter Calculator simplifies exposure adjustments by helping photographers and videographers determine the correct shutter speed when using neutral density (ND) filters. These filters reduce the amount of light entering the lens, enabling creative effects like motion blur and depth control in bright lighting conditions.

Formula

FS = $BS \times 2^n$

Variable	Description
$FS$	Final shutter speed with the ND filter applied
$BS$	Base shutter speed without an ND filter
$n$	Number of stops of light reduced by the ND filter

Solved Calculations

Example 1: Calculating Shutter Speed for 10-Stop ND Filter

Step	Value
Base Shutter Speed ( $BS$ )	1/1000 second
Number of Stops ( $n$ )	10
Final Shutter Speed ( $FS$ )	$1/1000 \times 2^{10} = 1$ second

Example 2: Calculating Shutter Speed for 5-Stop ND Filter

Step	Value
Base Shutter Speed ( $BS$ )	1/250 second
Number of Stops ( $n$ )	5
Final Shutter Speed ( $FS$ )	$1/250 \times 2^5 = 1/8$ second

What is ND Filter Calculator?

An ND Filter Calculator is a specialized tool designed to simplify the process of determining exposure settings when using neutral density (ND) filters in photography or videography.

ND filters reduce the amount of light entering the lens, allowing for creative techniques like long exposure shots or achieving a cinematic look in bright conditions.

By using this calculator, photographers and videographers can easily find the correct shutter speed or exposure time based on the ND filter stops and the initial exposure settings without a filter.

For instance, if your base shutter speed is 1/500 seconds and you are using a 10-stop ND filter, the calculator will determine the adjusted exposure time.

This tool is especially useful for long exposure photography, ensuring precise results without trial and error. Whether capturing smooth waterfalls, motion blur in cityscapes, or balanced brightness in video recordings, the ND Filter Calculator aids in achieving stunning visuals effortlessly.

Final Words:

In essence, an ND Filter Calculator is an indispensable resource for photographers and videographers aiming to perfect their shots. It enhances efficiency, minimizes guesswork, and ensures consistent results across diverse lighting conditions.

Contents

1 ND Filter Calculator

Steven

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