This image is the reason that I chose the Olympus camera instead of a full frame Canon. This was an opportunistic photo taken with at 400mm, F6.3 lens which weighs a kilogram and is about 8 inches long. To achieve the same result on a full frame I would have needed an 800mm lens which would weigh about 5Kg, and would be absolutely impossible to use hand held. In other words, I could not have taken this image if I had a full frame camera.
Here is a close up of the above image:-
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