The details are in the link you replied to and quoted a few posts above: https://www.canonrumors.com/forum/t...-100-500mm-rf-800mm-and-ef-400mm-do-ii.40550/ It's an R5.I couldn't see where you mentioned the camera, which for me was an R5. I suppose I could have got more pixels on it with the M6-II but it was hopeless trying to focus it. With the R5 I could crank the ISO, manually focus, then drop back down and take the picture.
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