Last Updated by Jouni Erola on 2025-07-22
1. The app calculates exposure aperture for you and also tells if you need to shorten (N+..) or expand (N-..) your development time.
2. It uses zone system theory originally invented by Ansel Adams and Fred Archer.
3. First decide zone of your shadows and measure the shadows.
4. Then device highlight zone and measure the highlights.
5. With this tool you can calculate your exposure and needed adjustment for development.
6. You also need to decide shutter speed in beforehand.
7. You will get best results with a spot light meter but mobile apps will probably do fine.
8. Measure these with the film ISO you are going to use.
9. Liked Zone Tool? here are 5 Photo & Video apps like Growth Marketing Tool: smmhub; Blemish Remover Photo Tool; Clippy: Video Editor Edit Tool; Circular Photo Cropping Tool; Face make up: beauty tool;
Or follow the guide below to use on PC:
Select Windows version:
Install Zone Tool app on your Windows in 4 steps below:
Download a Compatible APK for PC
Download | Developer | Rating | Current version |
---|---|---|---|
Get APK for PC → | Jouni Erola | 3.00 | 1.1 |
Download on Android: Download Android