The 28/3.5 AI is an excellent lens. It doesn't have the CRC
feature of the 28/2.8 AIS. What you save by getting the 28/3.5
AI will leave you enough to get a 55/3.5 Macro and then some.
The CRC feature is nice and I have it on other 28s like the
28/1.8 Konica UC Hexanon and the 28/2 Canon FD SSC. In the close
range any of the 55/3.5 Micro Nikkors will be better than these
28mm lenses with CRC.