Also, besides going to 1:1 and having AF (and flash D features), what does the 60/2.8D micro have over the 55/2.8 micro AIS? Second, why does the 60/2.8 micro have a 62mm filter thread, while the 105/2.8 has a 52mm thread? I'm tempted to get the 55 micro AIS for this very reason. Dan N.
