Oh dear, sensor spot on ZR100
This appeared today on my wife's ZR100, this is a shot of a plain painted wall, the target effect courtesy of dust blob on sensor stack I guess.
Full frame reduced to 560 wide, that "target" is constant size and zoom has no effect on it. I can see it move on the LCD when I gently shake the camera so I know that the sensor stabilisation is moving it.
Now to get a cleaning quote.... and might just also go order that ZR1000 just in case !