EXIF tag · ExifIFD

FocalLengthIn35mmFormat

Focal length converted to its 35 mm (full-frame) equivalent by the camera.

0xa405
Tag ID (41989 decimal)
ExifIFD
IFD / group
int16u
Data type
EXIF
Table

What FocalLengthIn35mmFormat means#

Focal length converted to its 35 mm (full-frame) equivalent by the camera.

Read, write and remove it#

# read
exiftool -FocalLengthIn35mmFormat photo.jpg
# write
exiftool -FocalLengthIn35mmFormat="…" photo.jpg
# remove
exiftool -FocalLengthIn35mmFormat= photo.jpg
# all files in a folder, as CSV
exiftool -csv -FocalLengthIn35mmFormat -r ./photos > focal-length-in35mm-format.csv

In Python with Pillow:

from PIL import Image
exif = Image.open("photo.jpg").getexif()
value = exif.get_ifd(0x8769).get(0xa405)  # FocalLengthIn35mmFormat
print(value)

Other ExifIFD tags#

Frequently asked questions#

What is the EXIF tag ID of FocalLengthIn35mmFormat?

0xa405 (41989 decimal), in the ExifIFD directory.

How do I see FocalLengthIn35mmFormat in a photo?

Run exiftool -FocalLengthIn35mmFormat 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

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