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


I'm New Here
Oct 29, 2019
Have those of you who own the lens found that the new firmware makes any IS jumping improvements? I reported the issue to Canon a few months ago, and was glad to see they issued a firmware fix. However, I am not really noticing any difference with the new firmware. Still jumpy.

Hi FrenchFry,

I report issue to canon few months ago too!

For me, the jumpy image was 50% rate when i switched on the camera so very often. I did the update and a few turns on / power on the device without having any problem .. I will test this more asap.

If you still have the problem, could you send a video ?


CR Pro
Nov 8, 2011
Updated! (as my 100-400II too). I remember this jump happening to me 3 to 4 times in the last 2 years with either 7D2 or 5DsR.I do not remember which one or both of them).