0x829dTag ID (33437 decimal)
ExifIFD
IFD / group
rational64u
Data type
EXIF
Table
What FNumber means#
The aperture f-number used for the shot.
Read, write and remove it#
# read
exiftool -FNumber photo.jpg
# write
exiftool -FNumber="…" photo.jpg
# remove
exiftool -FNumber= photo.jpg
# all files in a folder, as CSV
exiftool -csv -FNumber -r ./photos > f-number.csvIn Python with Pillow:
from PIL import Image
exif = Image.open("photo.jpg").getexif()
value = exif.get_ifd(0x8769).get(0x829d) # FNumber
print(value)Other ExifIFD tags#
- ExposureTime
0x829a - ExposureProgram
0x8822 - ISO
0x8827 - SensitivityType
0x8830 - RecommendedExposureIndex
0x8832 - DateTimeOriginal
0x9003 - CreateDate
0x9004 - OffsetTimeOriginal
0x9011 - ShutterSpeedValue
0x9201 - ApertureValue
0x9202 - BrightnessValue
0x9203 - ExposureCompensation
0x9204 - MaxApertureValue
0x9205 - SubjectDistance
0x9206 - MeteringMode
0x9207 - LightSource
0x9208 - Flash
0x9209 - FocalLength
0x920a - UserComment
0x9286 - ColorSpace
0xa001 - ExifImageWidth
0xa002 - ExifImageHeight
0xa003 - FileSource
0xa300 - CustomRendered
0xa401 - ExposureMode
0xa402 - WhiteBalance
0xa403 - DigitalZoomRatio
0xa404 - FocalLengthIn35mmFormat
0xa405 - SceneCaptureType
0xa406 - GainControl
0xa407
Frequently asked questions#
What is the EXIF tag ID of FNumber?
0x829d (33437 decimal), in the ExifIFD directory.
How do I see FNumber in a photo?
Run exiftool -FNumber photo.jpg, or open the file's info panel in Lightroom, Photoshop, Windows (Properties → Details) or macOS Preview (Tools → Show Inspector).
Last updated October 03, 2026 · How we calculate · Sources