Timo Piano

Hi all, I bought an Fujifilm X-T3 body in perfect condition and wanted to use it to shoot video with my Canon FD manual lenses via an adapter. And I found out that my EVF doesn't work at all. It's just dark and doesn't even display any settings when I switch to it. Could the problem be that I'm using manual optics? I think I've tried every possible setting, but maybe I'm missing something? Or is it a camera defect?