Lighting Ratio

Calculate contrast ratios with ease

Optimize Your Cinematic Lighting Quickly and Accurately

• Instant Fill and Background T-Stop Calculation
  • Input your key light stop and select your desired contrast ratio.
  • Get immediate results for the required fill or background stop to achieve your look.

• Accurate Contrast Ratio Evaluation
  • Simply enter both key and fill light reading stops.
  • Calculate the precise contrast ratio between your lights, essential for balanced exposure.

• Customizable Display Options
  • Choose between exact, rounded, or tenths display modes for T-stop values.
  • Tailor the interface to your workflow for maximum clarity on set.

• Clear, On-Screen Explanations
  • Get detailed equations and step-by-step explanations help you understand each calculation.
  • Designed to demystify complex lighting relationships for cinematographers.

• Industry-Standard Terminology
  • Uses familiar terms like “Key-Fill” and “Lighting Ratio” found on sets that resonate with professionals
  • Helps ensure that you’re always speaking the same language as your crew.

• User-Friendly Interface
  • Intuitive navigation and a clean design allow for quick adjustments on set.
  • Optimized for both rapid input and clear visualization of results.

Perfect For:
• Cinematographers, gaffers, and lighting professionals who need reliable, on-the-go lighting calculations.
• Anyone looking to balance and perfect their lighting setups with ease and precision.

HELP

Q: What does Lighting Ratios do?

A: It instantly calculates fill or background stops and contrast ratios based on your input light stops.

Q: How do I compute a fill or background stop?

A: Enter your key light stop and select your desired contrast ratio to receive the computed fill or background stop immediately.

Q: Can I customize the T-stop display?

A: Yes, you can choose between exact, rounded, or tenths display modes to suit your workflow.

Q: How is the contrast ratio determined?

A: Simply input both key and fill light stops, and the app computes the precise contrast ratio using industry-standard formulas.

Q: Is Lighting Ratios designed for professional on-set use?

A: Absolutely, it features clear on-screen explanations and familiar cinematography terminology for quick, reliable lighting calculations.

Q: Supported iOS Version?

A: The app is optimized for iOS 17.0 and up.