This is an “old” lens, I got it when it first came out in 2003 and it has served me very well. But it doesn’t get out much. This lens has one purpose and one purpose only, photographing small critters on projects. That means that it get’s out perhaps once a year. You might be wondering why I’ve not purchased the new 60micro. I wish I could justify the expense because it is a gorgeous lens! It’s sharp, AF is fast and it’s easy to hold. But, this version is just as sharp, just not as fast and for my limited need, serves the purpose.