How effective is R6's IBIS with EF Lenses?

QSMcDraw wrote:

How could anybody ever test IBIS without handholding? And if the phenomenon is consistently reproduced among a large number of shooters, that seems fairly strong evidence.

Well, those CIPA IS tests that give rise to the "x numbers of stops" numbers involve mounting the camera plus lens onto a "vibratory apparatus". They don't test by hand holding. It does make one wonder about the realism of the test scenario though.

The problem with testing on a tripod is that the R5/R6 IBIS "senses" when it is on a tripod within a few seconds, and adapts accordingly. (Though I always turn IBIS off when using a tripod, maybe just because I always have.)

The advice about tripods and IS is quite variable. In some Canon lens manuals, like the one for the RF 85mm f/2 they do say to turn the tripod off, but not why. In others, like for the EF 70-300 f/4-5.6 IS USM they say "maybe turn it off, maybe not". In still others they say to turn IS off when tripod mounted "to save battery power"!

You don't have to turn the camera off and on. You can wait a few moments when ECO MODE is on for the camera to time out. This also means that the problem is not limited to just when the camera is first powered on, but happens frequently during normal usage.

We agree: It is a bug that should be fixed. Does it detract from the overall amazing capabilities of the R5/R6? Each buyer/owner must decide.

Would Canon create an advertising campaign built around the promise: "World Class IBIS after the first shot!"? Of course not! They'd rather just fix the bug!

And, once more, thank you, juanmaasecas, for finding the pattern of the mysterious, occasional blurring of images that were expected to be sharp! I remember scratching my head at some soft images taken with my ef 35mm f/1.4L II, used in low-light indoors, then testing on a tripod, finding no problem. Until you demonstrated how the issue affects the first shot in a series, I assumed that I was jerking or jabbing or there was just some random IBIS problem.

No matter how sure we are that our technique is ok, a few visits to forums can easily convince us that we MUST be at fault, never the hardware. (Understandable, though, as there are more than a few influencers or cranks who just make stuff up!) So applause is due when a photographer keeps a clear head, a civil tongue, and then patiently explains how to demonstrate a bug. The best and sometimes ONLY way to get something fixed.

And yet I have trouble seeing the problem. Could be just me. It could be that some folks experience a phenomenon (Canon fixes "phenomena", as opposed to "bugs"!) and others don't. That may make it a tricky bug to fix, but if they put out a fix I won't argue, I will just install it.

I think IS/IBIS is just one more of those squishy not quite "objectively measurable" things ... and yet it works!