Exposure Time (Shutter Speed)
How long the sensor was exposed, in seconds.
- EXIF tag ID
- 0x829A
- Group
- Exposure
- Example
- 1/400 (frozen motion) · 1/15 (handheld limit) · 30 (long exposure)
- Editable in EXIF Viewer
- Yes
What iPhone writes
Usually 1/60–1/4000. Night mode combines multiple frames but records the effective time.
What dedicated cameras write
Written as a rational (e.g. 1/400). Bulb exposures store the measured duration.
How to view Exposure Time (Shutter Speed) 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
- Shutter Speed Value — The shutter speed in APEX units (log2 of 1/time). Redundant with Exposure Time but written by many cameras.
- F-Number (Aperture) — The lens aperture as an ƒ-stop. Smaller numbers mean a larger opening: more light and shallower depth of field.
- ISO (Photographic Sensitivity) — The sensor's sensitivity setting. Higher ISO brightens the image at the cost of more noise.