There have now been multiple reports about the IBIS shift/tilt on the Canon EOS R5 and Canon EOS R6, so I think it's safe to say it's more than a “phenomenon”.
I have been told that Canon is aware of the issue and that there will be a firmware update to correct the behavior. The source doesn't know what the timeline for the update is, but I imagine it will come when it's done and not a moment sooner!
More to come…
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I get the idea that Canon has been working on this for a while now. I guess some things are easier to address than others.
I am personally sorry I did not pay it closer attention and try it back then.
Nice work!!!!!!!(y)
ML
Can't say I've experienced it as bad as I've seen on others videos. Although the widest I shoot is 24mm.
If I use the CamRanger HDR function to shoot a series of bracketed images I will frequently get a blurred image at speeds between 1/15 and 1/4.
I do not get them if I use the in camera bracket function but only with the Cam Ranger.
I have been in contact with Dave at CamRanger and he is working on a solution but this info may mean he just needs to wait on Canon.
The real puzzle is that the blur occurs in any case when using the CamRanger HDR bracket feature. IBIS off, any shutter mode, and firm tripod. Every variable has been eliminated except the ability of the sensor to move on its own.
Ironically this is what kept me away form IBIS equipped cameras as I shoot exclusively on tripod with non-IS lenses. My fear was lack of reliable focus due to sensor not being locked in a repeatable and accurate location.
So far I think I shot 2-4 thousand images on the new firmware, if I remember correctly ALL with ibis on. I did not experience any bugs so far... (not saying this is made up, obviously^^)
You have to be using a non-IS lens that lets you set the IBIS to "Always" vs "Only on Shot." In "Always on Shot" mode is where the problem occurs. If you switch to "Only on Shot" the shake of the photo goes away, but the viewfinder becomes jerky since IBIS it not stabilizing the view. The problem is most evident (it happens at faster and slower shutter speeds as well) at about 1/10th of a second. It does not occur on a tripod.
The fact that "Only on Shot" makes the problem go away indicates that it is not caused by the pressing of the shutter button and that it was likely a firmware issue.
BTW, using electronic High-Speed Shutter in the fastest (+) mode, I was able to see the amount of rotation decrease between the 1st and 2nd shot and then become stable. This suggests the twist is occurring at the beginning of the shooting. It appears that when the camera is getting ready to take a shot the control of the rotational axis of the IBIS is misfiring and then has to settle.
With my typical way of shooting I would hardly notice it. Shutter speeds have to be slow enough in order to see it (I shoot events a lot, and since you don't want movement blur I shoot at least 1/100th of a second there), so I had to use 1/10th in the test. And also, most of my lenses have IS now. But it's good to get it fixed. Hopefully they'll throw in some extra menu options for IBIS as well, such as the ability to only use OIS
While juanmaasecas did a great job identifying the problem, he didn't explain it well enough so anyone could replicate it. It took some back and forth on DPreivew for me to replicate it. I found I could set my R5 with back button focus to focus in the corner with the starting magnification being 100% on the focus spot (MENU->Playback (Blue) -> Tab4 -> Magnification ->Actual Size from selected point) and the shutter in electronic. I could fire off shots and then in playback compare them with the thumbwheel. I didn't even have to download them to the computer.
My fear was that it would just be seen at Canon as "User Error" when it can be replicated if you know what to do. I suspect those that say their camera does not have it, didn't replicate the conditions correctly. It now sounds like Canon has been able to verify the problem which is a big step to getting it fixed.