Brightness Value
The scene brightness measured by the camera, in APEX units. Negative is dark.
- EXIF tag ID
- 0x9203
- Group
- Exposure
- Example
- 8.4 (sunny) · −2.1 (night)
- Editable in EXIF Viewer
- Yes
What iPhone writes
Written; a good indicator of how dark the scene really was.
What dedicated cameras write
Written by some brands.
How to view Brightness Value on iPhone
Open the photo in Photos, tap Share, then View EXIF (EXIF Viewer’s action extension). The field is listed under “Exposure”. Tap Edit to change it, or select several photos in the app to change them all at once. Or drop the photo into the free online EXIF viewer.
Related tags
- ISO (Photographic Sensitivity) — The sensor's sensitivity setting. Higher ISO brightens the image at the cost of more noise.
- Exposure Time (Shutter Speed) — How long the sensor was exposed, in seconds.