Quote Originally Posted by Xander Fischer View Post
Also, is there a quality difference between the nikon 90 f/4.5 and the nikon 90 f/8?
The f8 has 8 elements and is highly corrected. The f4.5 has 7 elements.

I have owned both. The f8 is really impressive in sharpness - provided you get a good sample. The Nikon 90 f4.5 is just *OK*.