Thank you. I wasn't specific enough. I need to know how well the 24mm f1.4L USM II, 85mm f1.2L USM II and 135MM f2.0 USM lenses will manual focus on the nex with an eos/Nex adapter? I currently own the fd versions of these lenses and they focus fine but some autofocus lenses do not focus manually very well. It's like they have a weird internal (sometimes circular) focusing and it's near impossible to manual focus. Also, if anyone recommends a specific adapter?