
Light Meter: Exposure Lux
Film Camera & Shutter Speed
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Free
In-App Purchases
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About
Light Meter: Exposure Lux helps you choose exposure settings for film and manual cameras using your iPhone camera. Set ISO and aperture, point at your scene, and read a suggested shutter speed alongside EV and estimated Lux.
METER, SET, AND RECOMPOSE
1. Open the live camera preview and aim at the scene you want to photograph.
2. Choose your film or camera ISO and lens aperture. The app calculates a shutter speed from the measured light.
3. Lock a reading to keep that exposure reference while you recompose. Start a new reading when you want to meter again.
Your photo ISO and aperture are remembered between sessions. Common choices include ISO 160 and 320, plus f/1.8 and f/3.5. Recent records let you review a saved reference or reuse its settings for a new measurement.
FREE FOR EVERYDAY PHOTO METERING
• Live EV and estimated Lux.
• ISO and aperture selection with full-stop shutter recommendations.
• Three reading locks per device each local calendar day.
• Access to your latest three locked records, stored on your device.
PRO FOR REPEATED MEASUREMENTS AND CINEMA WORK
An optional monthly or annual Pro subscription adds:
• Unlimited reading locks and access to up to 20 recent records.
• Manual EV calibration to adjust readings against a trusted reference meter.
• Cinema Mode: choose ISO, frame rate and shutter angle to calculate an aperture reference.
• Estimated light levels in foot-candles.
• Half-stop and third-stop shutter recommendations.
The purchase screen shows the current local price and any introductory offer available to you. You can restore purchases and open Apple's subscription management from Settings.
KNOW THE MEASUREMENT
This app estimates reflected light with the iPhone camera. Lux and foot-candle values are estimates derived from exposure, not calibrated incident-light measurements. Results depend on the camera, scene brightness and subject reflectance. Use them as an exposure reference; critical work should be checked with a dedicated meter. The preview guide is not a calibrated spot meter. The app does not capture photos or record video.
Camera frames are processed on your device for metering. Preview frames are not saved as photos or videos, and recent records are stored locally. The app interface is in English.
Privacy Policy: https://respected-course-3ef.notion.site/Privacy-Policy-368f4af95e31807c8487ca5d70c7142f
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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What's New in Light Meter
1.2
October 29, 2026
Bug fixes and improvements.
2
Subscriptions & In-App Purchases
Annual
Annual access to Pro metering tools.
$29.991 Year
3 Days trial



