Hi All, Long shot but just wondering if anyone has experience adapting the original Canon 100-400L f/4-f5.6 and how successful the AF is? Also wondering if this combo would be good for video? I currently have the Sigma MC-11 and looking to get a long telephoto for my A6500 for video and photo. The 100-400L used looks to be the best value for money compared to anything else I can find but worried that the AF would be useless with video and if I'd be better off just getting a native lens but for my budget. I don't think I'd be able to afford anything with the range and IQ the Canon would give me. Thanks!