pbelarge wrote in post #14974335
...and turn off the IS if you are using a tripod.
No. It is not necessary to turn IS off with this lens. It will turn IS off itself, in the absence of any movement, such as when the lens is locked down on a tripod.
In fact this is the case with all versions of Canon 70-200s with IS. Also all versions of 200/2, 300/2.8, 400/4, 400/2.8, 500/4, 600/4 and 800/5.6 with IS. In fact, IS can counteract fine vibrations such as mirror slap, that a tripod has no effect upon.
It is not the case and you should turn IS off manually when using the following on a tripod: 28-135, 24-105, 300/4, 100-400. If you don't turn off IS with these lenses locked down on a tripod, IS can go into sort of a feedback loop where it's actually causing movement rather than preventing it. You can see in the viewfinder when this occurs.
Not really sure about other lenses that have IS. No one from Canon has given an updated list in recent years. So I'd assume they need to be turned off.
Note that if shooting long exposures or video, you might want to turn off IS with any of the above lenses. IS can cause an image to "drift" slowly. And sometimes it "jumps". Neither is a problem with still photos at moderate shutter speeds. But they can be a problem if shooting long exposures or video.
Somebloke wrote in post #16550676
What advantage does mode 2 give? Why not just leave in mode 1 all the time?
Panning with moving subjects is often done to deliberately blur down the background. IS in Mode 1 can resist that blurring effect. Hence... Mode 2.