Long Exposure Calculator

Calculates the correct exposure time for neutral-density filters, with a built-in countdown timer.

iOSApp Store (US)★ 4.4 · 64 ratingsfreeWorldwide

Long Exposure Calculator works out the correct shutter speed for long-exposure shots taken with neutral density filters, supporting up to 24 stops of filtration, and includes a built-in countdown timer for the exposure. It is a small, free utility aimed at landscape and long-exposure photographers who need to convert base exposure to filtered exposure time.

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