Short-eared Owl testing

since getting the new Canon 300 2.8 II I have spent little time actually testing its performance just putting it on the settings I used with the old lens -- in the last day or two I have been testing the Image stabiliser mode 3 which only works when you press the shutter; it looks odd as the image is wandering about while you are looking through the viewfinder but -- all these images taken late afternoon, very dull, Canon 1D4 with 300 2.8 II and 1.4x III converter all hand held; mostly ISO 1600 with shutter speeds of 200th second down to 50th second on the perched post shots -- flight shot at 125th second the second image with neat image applied