Firmware: Canon EF 400mm f/4 DO IS II USM v1.0.9

Last updated: November 5, 2020 9:30 am

Craig

Published: November 5, 2020

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Canon has released new firmware for the Canon EF 400mm f/4 DO IS II USM, which fixes an issue with the IS jumping.

Firmware Version 1.0.9 incorporates the following fix.

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

Download firmware v1.0.9 at Canon USA

TAGGED:EF 400 f/4 DO IS II

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Craig is the founder and editorial director for Canon Rumors. He has been writing about all things Canon for more than 17 years. When he's not writing, you can find him shooting professional basketball and travelling the world looking for the next wildlife adventure. The Canon EOS R1 is his camera of choice.