I'm trying to find information on the available frame rates ( fps ) for the full-frame cameras shooting 4k video in movie cropping mode. It seems the specs and manuals don't tell you this. I shoot wildlife so the 1.6x magnification - still with 4k resolution - is handy. I saw from a reviewer that the R6iii does 60fps cropping ( and 120fps full frame ). What about the R8 and R5?