I'm a cranky old bugger so take that into account. I have bought and eventually sold almost all the newer AF Nikkor lens I wanted to use. Their specialty wideangles are great, the others suffered from terrible fringing and flare. On the other hand my old prime Nikkor MF lenses some of which I bought in the 70's are still stellar performers. I am not sure if Canon etc. suffer from the same QC issues like Nikon but I have found both old and new lenses have quite a variation in quality from lens to lens. I tested several lens of each FL before actually buying.