I've never dared to post on this topic as I don't own anything longer than a 70-200 f/4 IS L-lens. In fact, this photo was taken at a focal length of only 10mm (16mm FF equivalent on my Canon 7D). I was shooting sunset and these two geese happened to stop by to give my scene a subject.
EF-S 10-22mm at 10mm, f/22, 1/2 sec, ISO 100, EV 0
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