RRS wrote:
If you said turn off VR I'd agree but MOST lenses from Canon can be used with IS turned on. It does use more of the battery...
I edited your response slightly (in bold)...
In fact, out of the nearly 60 different IS lenses Canon has offered to date, only four or five are "known" to
require IS be turned off by the user, when "on a tripod". They are the EF
75-300mm IS USM (their first IS lens, long ago discontinued), EF 300/4L IS USM, EF 28-135 IS USM and original EF 100-400L IS USM. Some users have also observed that it's better to turn IS off on the original EF 24-105L IS USM.
It actually has nothing to do with "older" or "newer" Canon lenses. Some of the above are still in production or have only very recently been superseded by new models.
MOST Canon lenses "self-detect" lack of any movement and turn off IS themselves, automatically. There is no difference in power savings (i.e. battery charge), whether you turn it off manually or the lens turns it off automatically.
The "problem" with those few Canon lenses is that when there is absolutely no movement for the IS to correct, if it's left turned on their IS system can go into sort of a feedback loop where it's actually creating "shake", rather than correcting for it, and will cause "shake blur" in images. If you forget to turn IS off, you'll see rapid, jumpy movements in the viewfinder (or Live View) and can then turn it off... no harm done to camera or lens. It might spoil a shot, though, if you took one while it was happening.
One of the most common situations where this might occur is when the lens is "on a tripod". However, that's not necessarily the
only case where a lens might be fully locked down... there can be other situations that produce the same effect. Plus, conversely, there are tripod techniques where there's plenty of movement still occurring (to keep IS "happy") and it might be better left on.... for example panning shots and/or when using a "loose" gimbal head to track a moving subject.
Don't confuse the above "problem" with a slower "image drift" movement that's commonly seen in viewfinders when using IS lenses. This doesn't harm image quality in any way (but might be an issue if you are shooting video or trying to frame a still shot very precisely). You also might often see a quick "hop" or "jump" when IS is first starting up, or if you make a sudden movement, before IS settles down and does its job. Again, those aren't a problem.
You are correct... this pertains to Canon IS lenses ONLY. I haven't used them personally so have no idea about Nikon VR, Sigma OS, or Tamron VC systems. While the purpose is the same, all manufacturers use their own, patented stabilization systems. So there are almost certainly differences. For example, many Nikon users think VR slows down Nikkor autofocus performance and there appears to be some evidence to support that. After using a number of Canon IS lenses for fifteen years, I think the opposite is true with them.... That Canon IS helps AF perform a little quicker and track movement better. But, I really haven't tried to test it, this is just an opinion based upon a lot of experience with the Canon lenses.