The f/5.6 could be an interesting lens as well, specially if made compact, but we're looking at two very different targets here.
Also, unless they gave internal zooming to the f/5.6 possibility, there could be some overlapping with the RF 100-500mm, because it's less than a f-stop of difference, on the long end.
Also, unless they gave internal zooming to the f/5.6 possibility, there could be some overlapping with the RF 100-500mm, because it's less than a f-stop of difference, on the long end.
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