Max Aperture Value
The lens's widest aperture at the focal length used, in APEX units.
- EXIF tag ID
- 0x9205
- Group
- Exposure
- Example
- 1.66 · 3.0 (ƒ/2.8)
- Editable in EXIF Viewer
- Yes
What iPhone writes
Equals the module's fixed aperture.
What dedicated cameras write
Useful to tell whether a shot was wide open.
How to view Max Aperture 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
- F-Number (Aperture) — The lens aperture as an ƒ-stop. Smaller numbers mean a larger opening: more light and shallower depth of field.
- Lens Info (Lens Specification) — Four numbers: minimum and maximum focal length, and the maximum aperture at each end.