Exposure Calc - Exposure Calculation for Photographers

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This app doesn’t do anything. You can double tap on the four selections but nothing happens. The numbers don’t change, there’s nowhere to I put any values. It’s just a screen with four numbers on it. Stupid

Very basic app, easy to use. The other reviewer didn't realize you change settings by sliding across the screen. What it does is allow you to calculate a setting when you change other settings. For example, if you take a pic with a high ISO, but low shutter speed, and want a low ISO with a long shutter speed, you enter in the 3 settings from the first pic, and then double click on the setting you want to know. So I double clicked on the shutter speed, lowered the ISO, and it gave me the proper shutter speed. This is exactly what I wanted it for.