I have used many lenses from Canon and Nikon with image stabilization.
Canon’s image stabilization (IS) can blur shots under some circumstances on a tripod.
I am not saying that IS won’t help in many circumstances— it does help if things are jiggling around. But it isn’t always a win. But that should not be surprising, as I found similar issues with the Canon 200mm f/2L IS.
Bottom line: you’ll have to do your own testing with IS to see when it helps and when it does not, and this is likely specific to the support being used, your technique, and even whether it is windy or not.
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