i had this lens from transitional phase early F mount (quite rare) it's and tack sharp from 5.6 quite good at F4 too.
the appeal is the size imo, it's really tiny, it' looks awkwardly-funny on a D3 sized camera.
gorgeous for Nikon F(2) though.
would go for one in nikon-S mount if i'd found at good price. optically it's really good.