Here is a link to some samples of mine using the Sigma 150-500mm Sport with the Canon 1.4x III converter on the R5. The autofocus with this combination works much better on the R5 than it does on my 5D IV or 7D II. Bob. Canon R-5: Rahto: Galleries: Digital Photography Review : Digital Photography Review (dpreview.com)
Canon EOS 5D Mark II Canon EF 24mm f/1.4L II USM Canon EF 85mm F1.8 USM Canon EF 135mm F2L USM Canon EF 200mm f/2.8L II USM +4 more Canon EF 135mm F2L USM Canon Extender EF 1.4x III Canon Extender EF 2x III
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