Is there a way to downgrade the firmware on a 5D MKII? I'm having to send off a 5D MKII (err 30) that is mated to a WFT-E4 (old version) and it has firmware v. 1.1.0. My backup body is a 5D MKII with firmware v. 2.0.7 and I cannot get it to work with the WFT to save my life.
Also, does anyone know what the last current firmware version was for the WFT-E4?
Any help is hugely appreciated. I'm pulling my hair out over this.
Bob
