Not a great shot in terms of sharpness, but I thought worth posting as it was literally the first image I took with my Canon 100-400L. I had the intention of using to give me the further reach for wildlife shots, as well as close-ups of distant landscape scenes.
On this occasion, I had the lens on my Canon 7D, I has just left my house for a wander to get used to the feel of the lens and the way the zoom worked (push-pull as opposed to twist) when this Buzzard appeared over the hedge in the adjacent field. I had little time to react, and not knowing the lens took a couple of quick shots before the bird was gone.
I quite like the composition, but am not keen on how blurred the image is. I was at full reach on the lens (400mm), f5.6, ISO 200, 1/320s… handheld and panning to follow the bird. I am fairly sure I focussed on the Buzzard, but a combination of not a high enough shutter speed, handheld and panning resulted in a blurred image.
I am looking forward to the next opportunity to photography a bird of prey, and hopefully get an improved image!