In article <51747s$gnm@inet-nntp-gw-1.us.oracle.com>, jtjioe@us.oracle.com says...

>What can I use for Nikon 105/2.8 AFD Micro lens to be able to focus
>real close? Should I use extension tube or close up filter/lens?

Nikon 4T achromat or Sigma achromat, tubes, and/or teleconverters
will all give good results alone or in combinations, if you use
f11-16.
Hope This Helps