PetaPixel ZoneLab Helps Analog Photographers Determine the True ISO of Their Film

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Start date Yesterday at 7:43 PM

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Yesterday at 7:43 PM

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A graph with several colored curves compares the tonal response of different black-and-white film stocks over a grayscale background labeled from I to IX, showing exposure and contrast data. A highlighted box marks a section on the graph.

A new analog photography app allows film shooters to determine the precise ISO of any given roll, as the number on the box can sometimes be inaccurate.

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