Looks like Canon is fixing some IS issues with the 100-500
EOS R5 Firmware Update, Version 1.1.1 [Mac OS X]
Firmware Version 1.1.1 incorporates the following fix and enhancement: 1. When the RF100-500mm F4.5-7.1 L IS USM lens is attached, an image stabilization effect ...
my.canon
EOS R5 Firmware Update, Version 1.1.1 [Windows]
Firmware Version 1.1.1 incorporates the following fix and enhancement: 1. When the RF100-500mm F4.5-7.1 L IS USM lens is attached, an image stabilization effect ...
my.canon