After reviewing my "new" 105mm f/2.5 AI-S, this afternoon I took my 28 years old Micro-Nikkor 105mm f/4 AI-S to chase some local birds.
Manual focusing at f/4 is more challenging than with f/2.5, but once the focus is spot on this Micro-Nikkor produces fantastic image quality at wide open.
The bokeh is not as good as the f/2.5 version, but still is very smooth and creamy. Contrast is better than the 105/2.5 and colours rendition is excellent on my D2Hs.
Here are some images from this afternoon, all taken at wide open (f/4) !! :
#1 : 1800x1200px
#2 : 1280x850px
#3 : 1800x1200px
#4 : 1800x1200px
#5 : 1800x1200px