Just received the Sigma MC11 adapter which will allow me to use Canon EF lenses on this camera. Not all automatic functions work. Auto focus in good light is pretty good - in low light best to switch the focus on lens to manual and rely on camera peaking for manual focus - not difficult at all. This was shot in a room with C50 fluorecents in the ceiling. Camera was in silent mode and I don't see the horizontal bands that often turn up with fluorescents - better to shoot in non-silent mode when I'm dealing with fluorescents, however.