What characteristics are you looking for Tim? Because as Terry says, the ZF is extraordinary in some, and not as extraordinary in others. It is very sharp and has lovely bokeh, but it does show chromatic aberration, particularly wide open. It also has a very long focusing range, which is great for macros bet less so for a general purpose lens. If you want a general purpose telephoto that is very sharp and has nice bokeh, I would look at the Voigtlander 90mm APO if you can find one. I have not used the 105 VR, but that is another great lens in that it has autofocus which makes it a lot more useful in a lot of situations. After trying a lot of lenses in this range for the Nikon, I wound up with the 135mm f/2 DC lens, which, while still not perfect, combined all the things I was looking for (sharpness, good bokeh, autofocus and lens speed).