Zone Tool1.2
Publisher Description
With this tool you can calculate your exposure and needed adjustment for development. It uses zone system theory originally invented by Ansel Adams and Fred Archer.
First decide zone of your shadows and measure the shadows. Then device highlight zone and measure the highlights. Measure these with the film ISO you are going to use. You also need to decide shutter speed in beforehand.
The app calculates exposure aperture for you and also tells if you need to shorten (N+..) or expand (N-..) your development time.
You will get best results with a spot light meter but mobile apps will probably do fine.
Version History Bugfixes 1.2 Mar 3 Fixed N calculation (was reversed)
Added developing tip text 1.1 12/01/2019 1.0 11/29/2019
About Zone Tool
The company that develops Zone Tool is Jouni Erola. The latest version released by its developer is 1.2.
To install Zone Tool on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-10-13 and was downloaded 5 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Zone Tool as malware if the download link is broken.
How to install Zone Tool on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Zone Tool is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After Zone Tool is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
Program Details
System requirements
Download information
Pricing
Version History
version 1.2
posted on 2026-10-13
Version History Bugfixes 1.2 Mar 3 Fixed N calculation (was reversed)
Added developing tip text 1.1 12/01/2019 1.0 11/29/2019
version 1.2
posted on 2026-03-03
Bugfixes
version 1.1
posted on 2019-12-01
Fixed N calculation (was reversed)
Added developing tip text
version 1.1
posted on 2019-12-01
Dec 1, 2019
Version 1.1
Fixed N calculation (was reversed)
Added developing tip text
