The Canon EF 100-400mm f/4.5-5.6L IS II USM is a professional telephoto zoom lens featuring a push-pull zoom mechanism, 4-stop Image Stabilizer, and fluorite elements for sharp, high-contrast images from wildlife to sports photography. It is one of Canon's most popular L-series telephoto zooms and supports 1.4x and 2x teleconverters for extended reach. Firmware updates address AF compatibility with newer EOS camera bodies.
Product released: November 1, 2014
Latest firmware version
Version 1.0.7, released October 21, 2020
What's new in version 1.0.7
Firmware Version 1.0.7 incorporates the following fix. Fixes a phenomenon, in rare cases, the IS mechanism may cause the image to jump. Firmware Version 1.0.7 is for lenses with Firmware Version 1.0.6 or earlier. If the lens' firmware is already Version 1.0.7, 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 you downloaded are the firmware (File name:EF008107.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.