This is what manual says:I'd prefer to get a definitive answer.
It seems like from some googling that the E-P5 and E-M5 are smart enough to know that a lens has OIS and turns it off if your IBIS is on.
My guess is that OFF reads "no priority" to OIS, rather than disabling it. But I wonder how this can be proven and if there are any IQ consequences for having IBIS and OIS working together..If [On] is selected, priority is given to the lens function
operation when using a lens with an image stabilization
That's correct. The only way that you can enable OIS on a lens without a physical switch is to do so from the camera body. In the case of the E-P5, that means setting Lens I.S. Priority to 'On' and enabling IS in the Super Control Panel. If you have a lens with a physical switch, the setting there overrides the 'Lens I.S. Priority' setting. So if the OIS switch is on, you get OIS, otherwise you get IBIS or no IS depending on the camera's IS setting.I would think (hope) that the E-P5 is also smart enough not to simultaneously run both IS systems with Panasonic lenses that don't have a physical IS switch