Meter One

A simple reflected light meter for film photographers using manual, vintage, 35mm and medium-format cameras.

Meter One is a reflected light meter for film photographers.

Point your iPhone at the scene. Meter One reads the light and gives you practical exposure settings: shutter speed, aperture, ISO and exposure compensation.

It is built for real analog gear. Manual cameras. Vintage lenses. Medium-format systems. Bodies with missing, broken or unreliable meters.

Meter One does not work like a generic exposure calculator. It lets you define the limits of your camera and lens, so the recommendations match the gear you actually use.

Features:

• Live reflected-light metering with the iPhone camera • Aperture Priority, Shutter Priority and Manual modes • ISO and exposure compensation controls • Recommended shutter speed and aperture • Camera body shutter-speed limits • Lens aperture limits • Hold reading control • Analog-style exposure dial • Saved readings and film roll log • Calibration tools • On-device metering

Use Meter One with manual 35mm cameras, medium-format cameras, vintage SLRs, rangefinders and classic systems with limited shutter speeds.

Meter One Pro is a one-time lifetime unlock. It includes unlimited gear profiles, saved readings, calibration tools and future film workflow features.

Privacy:

Meter One uses the camera preview for live metering. It does not need to save photos for exposure measurement, and camera frames are not uploaded.

No ads. No account. No tracking.

Meter One is a practical reflected-meter aid for film photography. Readings can vary with scene contrast, lighting conditions, camera behavior and device characteristics.