Lux turns your iPhone or iPad into a professional-ready and convenient light meter for film photography. The first light meter on the App Store to use metering data directly from the camera sensor. Note: Lux is designed for use with a separate camera. This app does not take digital photos. Highlights: - Live preview with tap-to-focus produces metering to match the image as displayed on your iPhone or iPad - Accurate, fast metering data directly from the camera sensor - On-screen controls provide instant feedback atop the live preview - Supports full stops, third stops and half stops