The comparison by The Camera Store put E-M1 ahead of GH4 in S-AF IIRC. It is impressive how far mirrorless from every brand except Canon and Samsung have come.3 upvotesBy James McDaniel (11 months ago)While I am currently working on some baby photos (in Lightroom 5) that I did for a friend, I will keep an eye on this comment thread and do my best to answer any additional questions that might come up