So here is the view from our deck with three lenses on a full frame camera. The images are marked with the lenses used and an arrow indicates boat on the horizon shown in the final frame cropped in.  It probably would have been a bit sharper if I had used a tripod.  The lenses were 17-40mm 70-200mm, 100-400mm and 100-400 with 1.4x extender.

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