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Zone System is your on-set exposure tool for cinematographers, photographers, and lighting professionals. It provides fast, accurate f-stop and T-stop calculations using the traditional Zone System, helping you master exposure and lighting control.
• Input your key light stop (Zone V) and select any zone (0–10) to instantly get the corresponding stop for precise exposure.
• Manually choose a zone or view all zones with calculated f-stops for quick reference.
• Choose exact, rounded, or tenths display to match your precision needs.
• See on-screen equations and breakdowns showing how each stop is calculated.
• Switch between Roman or standard zone numbers, and choose T-stops or other aperture types.
• Fast, easy-to-read design built for efficiency on set.
Achieve perfect exposure with Zone System, the tool for lighting precision in studio or on location.