Perhaps impossible, but found out that my battery drains very fast during filming if the OIS (or VC as on Tamron) is turned on. At the moment I turn the thing off between every take, but sometimes I forget. OIS is always on when liveview is on even though Im not recording video. If outside liveview the OIS turns off after about 5 seconds of non use.
It would have been a great feature to have the OIS physically turned on, but only active during recording.
It would have been a great feature to have the OIS physically turned on, but only active during recording.