Zone Tool 4+

Zone system calculator

Jouni Erola

Designed for iPhone

    • 3.3 • 3 Ratings
    • $0.99

iPhone Screenshots

Description

Tool to calculate your exposure and needed adjustment for development.

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.

What’s New

Version 1.1

Fixed N calculation (was reversed)
Added developing tip text

Ratings and Reviews

3.3 out of 5
3 Ratings

3 Ratings

Kihgfdsal ,

Pretty good overall

If it is possible, adding the adjustment for shutter speed instead of only the aperture will be so much helpful.

App Privacy

The developer, Jouni Erola, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

Supports

  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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