Aperture Meter

Measure lens aperture and light ratio on a film production set with this simple tool. Use device sensor data or enter LUX manually. Change camera ISO, shutter speed, FPS and ND filter settings. Save light to list and use data to calculate light ratios between readings. Based on your camera's dynamic range, Aperture Meter can calculate over or under exposed lights on your production set.


Features:
- Calculate F-stops based on your camera's dynamic range.
- Multi point sensors calibration.
- Color temperature readings. (Only devices with RGB sensors).
- Use side volume keys to save light.
- Audio notification.
- Wake lock (prevent display from sleeping).
- Uses 18% middle gray for calculation.
- Free and without ads.

Usage:
1. Set your camera settings by entering ISO, SS, FPS and ND filter.
2. Point your device sensor toward measured light.
3. Click 'Save' or use side volume keys.
4. Measure and save all light sources in your scene.
5. At the bottom list, select two or more saved lights.
6. On the primary key light, click 'KEY' button. This light should be 18% middle gray.
7. Light Ratio Scale will appear, displaying all selected light sources relative to Key light.

NOTE:
This app requires devices light sensors to work in automated mode. If your device is missing sensors, you can still enter LUX data manually.