The Speedlite EL-5 has the new multifunction accessory shoe foot, this means it will only fit on the hotshoe of the following models of EOS R cameras.
- EOS R3
- EOS R10
- EOS R50
- EOS R7
- EOS R8
- EOS R6 Mark II
There is no adapter to allow this Speedlite to be fitted to your EOS-1D X Mark II hotshoe.
However, if you use a Speedlite Transmitter ST-E3-RT (any version) or Speedlite 600EX II-RT, Speedlite 430EX III-RT, Speedlite EL-1 on you camera hotshoe they can control the EL-5 off-camera when it is configured as a receiver (formerly known as slave) unit.
Brian
EOS specialist trainer, photographer and author
-- Note: my spell checker is set for EN-GB, not EN-US --
