Downsampled to 24MP the R5 would match or exceed the R6ii so far as iso efficiency is worried. fps could well be an advantage to the R6ii. I wasn't worried about the lenses dealing with EyeAF ..All of these must. So far as the lenses, the sole one that was https://griffintrpnk.blogzet.com/little-known-facts-about-eos-r-32239370