hello there. I'm looking for an answer before I switched from canon to sony. ( i own an a7r3) . I work like 80 % with my Speedlight on. BUT, at mirrorless cameras ( i I think all of them) the TTL assist beam won't fire and I cant easily ( like never) focus in the dark. maybe you've heard something or is any update going to be released that helped with this issue? I mean I have events concerts that are really really low light and I end up getting my old Canon DSLR because of the assist of the beam. thanks.