I have a set of 3 x 600EX-RT I use on my 5D III with a ST-E3-RT. I want to use this setup with a Fuji X-T1. I know I will not get E-TTL but if I use this with the Fuji can I still get manual remote power control of each of the speedlites? I'm assuming manual mode power setting doesn't need any info from the camera about aperture or shutter speed.
Has anyone tried this out. If it works it would save me a lot from having to get some other kind of transciever like the Cactus V6 to interface to my remote 600EX-RT's