Aperture f-number (e.g. 1.4, 2.8, 5.6, 16). Smaller = wider = more light.
Shutter time in seconds (e.g. 1/125 ≈ 0.008). Longer = more light.
ISO sensitivity (e.g. 100, 400, 1600). Higher = more light.
OptionalexposureExposure compensation in EV stops (+ brighter, − darker). Default 0.
Photographic camera exposure settings.