I just got a Zuiko 35mm/3.5 macro, and I would like to know what the difference is between macro lenses and regular lenses, other than focusing closer. This one seems like the lens elements are a lot different than my other 35mm lenses because they are like recessed inward a lot. Plus, there is no distance readout in feet, only magnification readout in terms of 1:2, 1:3 and so on.