Light Meter & Logbook
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Turn your phone into a professional light meter and photo logbook —
built for film digital medium-format and pinhole photography.
**ACCURATE EXPOSURES**
• Reflected metering using your phone’s camera
• Incident metering using the built-in light sensor
• EV calibration for consistent precise results
• Fractional stops (½ ⅓) for fine control
**ADVANCED TOOLS**
• ISO from 3 to 25600 — full range for any situation
• ND filter support and long-exposure timer with reciprocity correction
• Spot metering with live histogram
• 35 mm equivalent and medium-format focal length display
• Color filter preview for accurate B&W film visualization
• Pinhole camera support with custom f-numbers
• Built-in library of 20+ films; add your own and use push/pull
• Equipment profiles for cameras lenses and pinhole — including medium format
**FAST & FLEXIBLE**
• One-tap exposure calculation
• Customizable metering layout
• Dark mode and haptic feedback
**PHOTO LOGBOOK**
• Record exposure settings location and notes for every shot
• Keep all shooting data organized and easy to find
**PERSONALIZED INTERFACE**
• Light Dark or System theme
• Material You dynamic colors
• Custom primary color
Download Light Meter & Logbook for accurate exposures and a complete shooting record — all in one app.
**ACCURATE EXPOSURES**
• Reflected metering using your phone’s camera
• Incident metering using the built-in light sensor
• EV calibration for consistent precise results
• Fractional stops (½ ⅓) for fine control
**ADVANCED TOOLS**
• ISO from 3 to 25600 — full range for any situation
• ND filter support and long-exposure timer with reciprocity correction
• Spot metering with live histogram
• 35 mm equivalent and medium-format focal length display
• Color filter preview for accurate B&W film visualization
• Pinhole camera support with custom f-numbers
• Built-in library of 20+ films; add your own and use push/pull
• Equipment profiles for cameras lenses and pinhole — including medium format
**FAST & FLEXIBLE**
• One-tap exposure calculation
• Customizable metering layout
• Dark mode and haptic feedback
**PHOTO LOGBOOK**
• Record exposure settings location and notes for every shot
• Keep all shooting data organized and easy to find
**PERSONALIZED INTERFACE**
• Light Dark or System theme
• Material You dynamic colors
• Custom primary color
Download Light Meter & Logbook for accurate exposures and a complete shooting record — all in one app.
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Light Meter & Logbook / What's New in vUnknown
- Improved camera metering on more Android devices, including
phones that do not report ISO in photo metadata
- Added first-run calibration guidance and auto-calibration for more accurate metering (manual EV adjustment in Settings → Calibration)
- Logbook: long-press photos to select multiple and delete in batch
- Added first-run calibration guidance and auto-calibration for more accurate metering (manual EV adjustment in Settings → Calibration)
- Logbook: long-press photos to select multiple and delete in batch
