Exactly what I was looking for
Great app! No ads, no clutter, it just does exactly what you need.
$4.99
About
This app helps creators calculate precise ND filter strengths and long exposure times for photography and videography. It offers an integrated timer and a special mode for DJI drones, simplifying complex lighting and motion settings.
✓Exposure calculator for long exposures
✓ND filter calculator for cinematic shutter speeds
✓Built-in long exposure timer
✓Dedicated DJI drone mode
✓Light and dark modes
✓Customizable timer alerts
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What's New in NDFExpo
1.0.2
August 30, 2026
Fix bugs Fix performance issues
User reviews
FAQ
What is NDFExpo used for?
NDFExpo is a tool designed to help photographers and videographers calculate the correct ND filter strength needed for specific lighting conditions and determine the appropriate long exposure times for their shots. It aims to eliminate guesswork in setting up shots.
How does the exposure calculator in NDFExpo work?
The exposure calculator allows you to input your camera's base shutter speed. The app then calculates the precise long exposure time required, ensuring you achieve the desired effect, especially when using ND filters.
Does NDFExpo have a special mode for drones?
Yes, NDFExpo features a dedicated DJI drone mode. This mode adjusts calculations to match the specific shutter speed scales used by DJI drones, ensuring accurate results for aerial photography and videography.
Can NDFExpo help me achieve the 180-degree shutter rule?
Absolutely. The ND filter calculator in NDFExpo helps you determine the exact ND filter (e.g., ND8, ND16, ND32) needed to achieve the cinematic 180-degree shutter rule based on your current lighting conditions and desired frame rate.
Does NDFExpo include a timer?
Yes, NDFExpo has a built-in long exposure timer. Once you have your calculated exposure time, you can use this integrated timer to accurately capture your shot, whether it's for a few seconds or several minutes.
What devices is NDFExpo available on?
NDFExpo is available for iPhone and iPad devices. It supports both platforms, allowing creators to utilize its features on their preferred Apple mobile devices.
How much does NDFExpo cost?
NDFExpo is a paid application. The current price is $4.99. This one-time purchase grants you access to all of its features without recurring fees.
Does NDFExpo have ads?
No, NDFExpo does not contain advertisements. As a paid application, it provides an ad-free experience for users, allowing them to focus on their creative work without interruptions.