Canon EF 400mm f/4 DO IS II USM

Canon EF 400mm f/4 DO IS II USM firmware

Canon · EF 400mm f/4 DO IS II USM · EF 400mm f/4 DO IS II USM · Lens

Latest firmware for the Canon EF 400mm f/4 DO IS II USM is v1.0.9 (October 21, 2020).

Specifications

EF 400mm f/4 DO IS II USM specifications

Focal length
400mm
Maximum aperture
F4
Minimum aperture
F32
Type
Prime Lens
Filter thread
52 mm
Elements / groups
18/12
Aperture blades
9
Closest focus
3.3 m
Maximum magnification
0.13×
Stabilisation
Yes
Autofocus
Yes
Mount
Canon EF
Weight
2100 g
Dimensions
233 × 128 mm

Changelog

EF 400mm f/4 DO IS II USM firmware changelog

  1. v1.0.9 first tracked

Firmware history

  1. Version 1.0.9 Latest Released Oct 21, 2020 First seen Jul 10, 2026
    Show release notes

    Firmware Version 1.0.9 incorporates the following fix.

    Fixes a phenomenon, in rare cases, the IS mechanism may cause the image to jump.

    Fi​rmware Version 1.0.9 is for lenses with Firmware Version 1.0.8 or earlier.

    If the lens' firmware is already Version 1.0.9, it is not necessary to update the firmware.

    The lens' firmware version can be checked from the camera's menu.

    Preparations for the Firmware Update: In the folder yo​u downloaded are the firmware (File name: EF007109.lfu /File size:1,441,844 bytes) and instructions on the firmware update procedures (a PDF file in five languages: Japanese, English, French, Spanish, and Simplified Chinese).

    Before starting the firmware update operations, please be sure to carefully confirm your understanding of these instructions.

    Release notes & download

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