The answer is an underwater pole cam. For example, Aquatica and Gates have proper solutions for this:
Amphibico POV Flexcam
Gates HMR10 / HCK10 (Point of View)
If your budget is none-existent, try a Gopro attached to a monopod which in turn is tied tightly to a sufficiently long DIY pole of any stiff material, e.g. a pipe. However, with a GoPro you will not be able to monitor in real-time.
With the GoPro App and the correct GoPro, you WILL be able to monitor real time. Even remotely control your GoPro.
bob_w: I'm experiencing the same phenomena with the E-M1, toggling override the manual mode. appreciate to know if any workaround.
With the E-M1, you can program the right arrow for Electric Zoom. Then use the arrows to power zoom in and out. There are no changes to the F-stop & Speed, as with the jump zoom, AND you can stop at any point between 12 & 50mm. So the process becomes:
1) Press right arrow - turns on electric zoom
2) Using arrows, zoom to desired position
3) Press OK - Turns off electric zoom and lets up/down/left arrows revert to regular setting
Press shutter halfway - Also turns off electric zoom