APSHEPPARD wrote:
I have the Nikon 60mm and the Sigma 105, and for my purposes, both are excellent, but admittedly, I have not put either of them into stressful environs. The Nikon 60 is built a little better to me but as several have pointed out, you get more flexibility with the 105. I think you will be happy with either. The Sigma I have will not work with the Z line adapter autofocus so becomes a manual focus which in many macro situations is what you might do anyway.
After some reading and pondering, I just bought a used Nikon Nikkor 28-105mm F/3.5-4.5 D IF Macro AF Lens from KEH. I have mounted and tried it out, for the money it seems great.