There have been a couple of the 55s for sale here recently, and it is highly recommended by Ron Reznick. It is MF and my 50/1.8 is AF, so what would I gain by adding the 55 to my stable? Anything significant? I know it will focus closer and is advertised as a micro lens, but my understanding is that it will only go to 1:2. I look forward to your suggestions. I might add that wildflowers are one of my favorite photographic subjects, but I don't really go for extreme closeup shots of these.