Light Meter by WBPhoto

The essential light meter app and exposure calculator for film and digital photography. Turn your phone into a precision spot meter trusted by 400,000+ photographers worldwide to nail the perfect exposure, every time.

PRECISION EXPOSURE METERING
• Spot meter - Measure precise exposure points using your camera
• Calibrated and tested for accuracy against professional Gossen and Sekonic meters

YOUR COMPLETE MANUAL PHOTOGRAPHY TOOLKIT
Master manual mode with this powerful suite of 9 calculators:
• Depth of Field (DOF) - Hyperfocal distance, near/far focus limits
• Reciprocity Calculator - Long exposure compensation for film photography (Portra, Tri-X, Delta, Ektar, HP5, and more). Essential for analog photography.
• EV/LV Converter - Convert between Exposure Value and Light Value systems
• White Balance Meter - Color temperature in Kelvin and Mired
• Bellows Factor - Exposure compensation for macro photography
• Flash Guide Number - Calculate flash power, distance, aperture
• Sunny 16 Calculator - Classic manual exposure reference
• EXIF Reader - Extract exposure data from any photo
• Angle of View - Calculate field of view for any lens and sensor combination

GOLDEN HOUR & BLUE HOUR
• Magic Hour calculator with sunrise, sunset, golden hour, and blue hour times
• Plan your landscape and portrait photography shoots with precision

BUILT FOR THE DEMANDING PROFESSIONAL
• Custom ISO, shutter speed, and f-stop ranges
• Half-stop and third-stop increments
• Shutter angle mode - cine meter features for filmmakers and cinematographers
• Live histogram display
• ND filter display options
• Foot-candles and Lux readout
• Built-in exposure timer for long exposures

SAVE & ORGANIZE
• Log exposures with GPS location and notes
• Hardware profiles - save camera/lens specs to automatically constrain meter output to your gear's capabilities
• Export and reference past readings

WORKS WITH ANY MANUAL CAMERA
Film SLR • Medium format • Large format • Pinhole • Cinematographic • Digital mirrorless

50+ languages supported
Home screen and lock screen widgets for quick access
No internet required for metering

YOUR CREATIVE PARTNER
Whether you're a seasoned filmmaker, dedicated analog enthusiast, or mastering your first manual camera, Light Meter is the only exposure tool you'll ever need. Download now and take confident control of every shot.