Zone Exposure Calculator
Aperture Setting =
Shutter Speed =
Exposure Priority = 1
Zone Placement = 0
Zone Setting Adjustment
Shutter Speed =
"The Zone System is a photographic technique for determining optimal film exposure and development, formulated by Ansel Adams and Fred Archer."
This program is for people who are already familiar with the zone system. Explaining how the zone system works is beyond this description. A quick search online will educate anyone interested in learning about the zone system.
This program allows the user to input a meter setting and obtain alternate settings, based on a zone preference. This program is similar to the old paper wheels that did the same thing. I have limited the aperture and shutter settings to the most popular ones found on cameras.
Contributed by Henry Chavez
Take a meter reading of a shadow area in a scene to photograph. Generally, you want the shadow detail to fall on zone III. Let us say your camera indicates f/8 @ 1/100. Enter these two setting in the first two fields. In the next section, select zone III and aperture priority, if you do not want to change the aperture. The program will return the new Zone setting. In this case f/8 @ 1/400. Conversely, you can select shutter priority to keep the shutter speed fixed and adjust the aperture.
Also, note that you can take a meter reading of a white or black area in your scene and set the zone appropriately. For example, a white rock with some detail could be set to zone VI or VII, depending on the amount of detail you want to record on your negative. Pure white would be zone X and pure black is O.