if you plan on buying 2 lenses in the 70 range as well as the 180-200, you definitely need to check out the Nikkor 70-180 macro lens. Certainly if you are using Nikon bodies. I have owned most micro lenses and this one was amongst one of the sharpest out there with lovely OOF rendering. Not at the level of my AIS 55/3.5micro but certainly comparable with the AF 200/4 Micro ( which is a great lens as well and one of those I hope is on Nikons list of updating).