I use focus peaking when in manual focus mode and it works beautifully with my Canon FD and my Nikon lenses and adapters. I also use my Canon screw mount lenses from my rangefinders. All are great lenses and I have put my Nikon DSLRs down and been going this route, since I have more flavors, tools, or lens palettes at my finger tips. I wish Canon and Nikon can put focus peaking onto there cameras. I have an X-E1 Fuji right now and I am considering getting a X-T2 and my Nikon DSLRs will get sold off. The Fujifilm cameras seem to work with my huge lens collection and I can carry my film Canons around and not worry about carrying too much equipment.
