Solution
With the EOS R, it is possible to focus (still shooting) over approx. 88% horiz. x approx. 100% vert. of the focal plane when a compatible lens is attached.
Followings are compatible lenses.
RF35mm F1.8 MACRO IS STM
RF50mm F1.2 L USM
RF24-105mm F4 L IS USM
RF28-70mm F2 L USM
EF14mm f/2.8L II USM
EF20mm f/2.8 USM
EF24mm f/1.4L II USM
EF24mm f/2.8 IS USM
EF28mm f/1.8 USM
EF28mm f/2.8 IS USM
EF35mm f/1.4L II USM
EF35mm f/2 IS USM
EF40mm f/2.8 STM
EF50mm f/1.2L USM
EF50mm f/1.4 USM
EF50mm f/1.8 STM
EF85mm f/1.2L II USM
EF85mm f/1.4L IS USM
EF85mm f/1.8 USM
EF100mm f/2 USM
EF100mm f/2.8 Macro USM
EF100mm f/2.8L Macro IS USM
EF135mm f/2L USM
EF180mm f/3.5L Macro USM
EF200mm f/2L IS USM
EF300mm f/2.8L IS II USM
EF300mm f/4L IS USM
EF400mm f/2.8L II IS USM
EF400mm f/2.8L IS III USM
EF400mm f/4 DO IS II USM
EF400mm f/5.6L USM
EF500mm f/4L IS II USM
EF600mm f/4L IS II USM
EF600mm f/4L IS III USM
EF800mm f/5.6L IS USM
EF11-24mm f/4L USM
EF16-35mm f/2.8L III USM
EF16-35mm f/4L IS USM
EF17-40mm f/4L USM
EF24-105mm f/3.5-5.6 IS STM
EF24-105mm f/4L IS II USM
EF24-105mm f/4L IS USM
EF24-70mm f/2.8L II USM
EF24-70mm f/4L IS USM
EF28-300mm f/3.5-5.6L IS USM
EF70-200mm f/2.8L IS III USM
EF70-200mm f/2.8L IS II USM
EF70-200mm f/2.8L USM
EF70-200mm f/4L USM
EF70-200mm f/4L IS USM
EF70-200mm f/4L IS II USM
EF70-300mm f/4-5.6 IS II USM
EF70-300mm f/4-5.6L IS USM
EF100-400mm f/4.5-5.6L IS II USM
EF200-400mm f/4L IS USM Extender 1.4×
< When using an extender >
It is possible to focus over approx. 88% horiz. x approx. 100% vert. of the focal plane when a above compatible lens with Extender 1.4x III or Extender 2x III is attached.
NOTE
Including overseas models.