EF 400mm f/2.8L IS III is Lighter than FE 400mm f/2.8 GM !

The new announced EF 400mm f/2.8L IS III USM lens is lighter than Sony’s new FE 400mm f/2.8 GM OSS mirrorless lens. Maybe Canon will announce the even lighter RF 400mm f/2.8L IS USM lens for EOS R mirrorless cameras in near future.