Lumina Meter

The light meter film photographers have been waiting for. LiDAR distance, zone system, 15+ film stocks. Free for a limited time — $1.99 later. Zero data collection.

Lumina is a precision light meter designed for film photographers. Turn your iPhone into a professional-grade metering tool with real-time exposure analysis powered by Metal GPU rendering.

METERING MODES

• Spot: Precise single-point metering for critical exposure control
• Center-Weighted: Classic center-biased metering for balanced readings
• Matrix: Advanced 3D matrix metering with scene analysis, highlight protection, and film latitude awareness
• Distance: Real-time LiDAR depth measurement for zone focusing and hyperfocal calculations (Pro iPhones)

LIDAR DISTANCE On Pro iPhones with LiDAR, Lumina measures real-time distance to your subject — right in the viewfinder. Invaluable for manual focus lenses, zone focusing, and nailing critical focus in the field.

ZONE SYSTEM Real-time Ansel Adams Zone System display (Zone 0–X) lets you visualize exactly where your scene falls — from deep shadows to pure highlights.

EXPOSURE TOOLS

• Live histogram with luminance distribution
• False color overlay for instant exposure mapping
• Zebra stripes for highlight and shadow warnings
• Aperture priority, shutter priority, and manual modes
• ±3 EV compensation with third-stop precision

FILM STOCK PROFILES Built-in presets for popular film stocks including Portra, Ektar, Tri-X, HP5+, Velvia, and more. Lumina adjusts metering behavior based on each film's dynamic range — slide films get aggressive highlight protection while negative films maximize shadow detail.

BUILT FOR FILM

• EV100 readout with 1/3 and 1/2 stop increments
• Full ISO, aperture, and shutter speed controls
• Calibration offset for matching your handheld meter
• Clean, dark interface designed for use in the field

PRIVACY FIRST All camera and LiDAR data is processed entirely on-device. No analytics, no tracking, no accounts. Your data never leaves your iPhone.