# NDFExpo — ND and Exposure calculators

> ND filter and exposure calculator for photographers and videographers. (iPhone/iPad app by Ihar Kazlouski.)

- Source: https://appshunter.io/ios/app/ndfexpo/id6754651006 (this page in markdown: same URL + `.md`)
- Developer: [Ihar Kazlouski](https://appshunter.io/developer/1816953691)
- Category: Photo & Video, Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.6 · 2 MB
- Languages: American English
- Released: 2025-11-10
- Data updated: 2026-09-02
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ndfexpo/id6754651006/reviews.md

## What is NDFExpo?

NDFExpo is your go-to tool for mastering light and motion, built by a creator for creators. Stop guessing settings and dial in the perfect ND filter or shutter speed in an instant.
It's a fast, simple, and powerful ND Filter and Exposure Calculator that helps you master light and motion. Whether you need to find the right filter or the perfect shutter speed, NDFExpo solves the calculation instantly.

WHAT IT DOES:
- EXPOSURE CALCULATOR Already have an ND filter on? Just enter your camera's base shutter speed, and the app will calculate the perfect long exposure time for you, down to the second.
- ND FILTER CALCULATOR Want that cinematic 180° rule (e.g., 1/50s)? NDFExpo tells you exactly which ND filter (ND8, ND16, ND32) to use in your current light.
- BUILT-IN LONG EXPOSURE TIMER Once you have your calculated time, use the integrated timer to get your shot right. Perfect for 30-second, 2-minute, or even longer shots.
- DEDICATED DJI DRONE MODE Standard shutter speeds don't match your drone? No problem. Enable the DJI-optimized scale to see calculations that perfectly match your DJI drone.

ADDITIONAL FEATURES:
- Clean, simple, and fast interface.
- Light & Dark Modes for any lighting condition.
- Customizable timer alerts.

PERFECT FOR:
- Drone Videographers & Photographers
- Landscape Photographers
- Filmmakers & Content Creators

## Key features

- 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

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ndfexpo/id6754651006/reviews.md

### 5/5 — Exactly what I was looking for

*2026-08-21*

Great app! No ads, no clutter, it just does exactly what you need.

## Frequently asked questions about NDFExpo

### 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.

## Version history (last 2 releases)

### 1.0.2 — 2026-08-30

Fix bugs
Fix performance issues

### 1.0 — 2025-11-11

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-02.*