Canon RF 14-35mm F4L IS USM

Canon RF 14-35mm F4L IS USM firmware

Canon · RF 14-35mm F4L IS USM · RF 14-35mm F4L IS USM · Lens

Latest firmware for the Canon RF 14-35mm F4L IS USM is v1.0.3 (December 8, 2022).

Specifications

RF 14-35mm F4L IS USM specifications

Focal length
14-35mm
Maximum aperture
F4
Minimum aperture
F22
Type
Zoom Lens
Filter thread
77 mm
Elements / groups
16/12
Aperture blades
9
Closest focus
0.2 m
Maximum magnification
0.38×
Stabilisation
Yes
Autofocus
Yes
Mount
Canon RF
Weight
540 g
Dimensions
100 × 84 mm

Changelog

RF 14-35mm F4L IS USM firmware changelog

  1. v1.0.3 first tracked

Firmware history

  1. Version 1.0.3 Latest Released Dec 8, 2022 First seen Jul 10, 2026
    Show release notes

    Firmware Version 1.0.​3 incorporates the following enhancement:

    1. Adds the ability to correct focus breathing during movie recording.
    • Compatible with cameras that supports focus breathing correction. If the lens' firmware is already Version 1.0.3, it is not necessary to update the firmware. You can check the firmware version of the lens from the camera menu. Refer to the camera instruction manual for how to check the current firmware version. Preparations for a firmware update: After the downloaded compressed file (.zip) is extracted, a firmware folder is created.
    • Extracting the downloaded file: Right-click the zip file, and then select Extract All to extract the file. In the folder you downloaded are the firmware ( RF043103.afu / file size: 2,883,636 bytes) and instructions on the firmware update procedures (a PDF file in five langu​ages: Japanese, English, French, Spanish, and Simplified Chinese). Before starting the firmware update operations, please be sure to carefully review the instructions to confirm your understanding of the firmware update procedures.
    Release notes & download

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