The 28/2.8 AIS with its very near focusing limit of 0.2 m is a highly versatile tool. Very amply demonstrated in this thread.
I'm having an on/off affair with my own sample of this lens. It was among the first lenses that I CPU-modified, many years ago, and I used it extensively for a time. Currently its status is "off", must see what I can do to change that !
A point of warning to owners or prospective buyers of the 28/2.8: being a CRC (close-focusing correction) design in which the CRC action takes place in the front of the optical assembly, it is vulnerable to knocks and bumps to the front or side. I have encountered more than one sample out of alignment over the years and in fact, my own sample kept initally because its serial number was the same as my banking account (!), had to be realigned at the national Nikon repair facility.