|Quoting ptrjong (Reply 8):|
I read that IS/VR is better turned off if shutter speed is faster than 1/500th, unless you are panning.
Well it would partly depend on what lens you are using. IS
does drain the battery, so if you are using a safe handhold speed, maybe you don't need it. I've also had the occasional shot ruined because the IS
got 'confused', but on the whole, with my lenses, I cannot see any reason not to turn it off based on image quality concerns. Of course other lenses may differ - its hard to have a general rule with so many variations out there - I think Canon alone has had at least 5 different versions. In fact it may be that the IS
in any particular lens is subtly different from any other.
I prefer to leave it on all the time, because I'm certain I'll forget to turn it back on when I need it.
One definite time to turn it off are those lenses which do not automatically 'tripod detect'. Some lenses MUST have IS
turned off when on a tripod.
Colin K. Work, Pixstel