I was looking closely at some pictures I took with my 80-400mm VR on Sunday and felt that the sharpness was not quite there. I had taken the pictures (of birds) from a hide (blind for my American readers ) with the camera resting on a bean bag propped firmly in the corner of the hide window. My question for the experts is should I have switched VR off in that situation as I would if it had been mounted on a tripod? I am going to do some experiments but would like some advice. Thanks.