Quote Originally Posted by Mark Sampson View Post
Back to the OP's question... both the Nikkors and Fujinons are top-quality lenses. You can't go wrong either way. Since all of them are used now, make your decision on condition and price.
I agree, but there might be other features to consider. There were at least three versions of the Fujinon 150mm f5.6 -- 1 W & 2 WS. There are differences in the shutter (Seiko vs Copal), coating (single vs EBC), filter size (46, 52, & 55mm), and Image Circle (224 vs 245mm). There may be similar "version" changes in the Nikon 150mm f5.6, for all I know. Taken together, these may be more important than brand, price, or condition -- but at least they should be thrown into the mix, along with size, weight, and optical design.