I just completed a homestyle resolution test of the 18-70 vs my Nikon 20mm 4 and my AFD 50 1.8. All shots at F8 on my tripod mounted D50 and a solid mounted newspaper as a target. Self timer used on all shots. At 20mm the 20 4 maybe, just maybe had a slight resolution edge. If so it was very faint and almost not worth mentioning. At 50 I couldn't tell the difference between the 50 1.8 and the 18-70. This really surprised me. Multiple shots were taken to provide the sharpest samples possible. BTW I was not cheering for any lens in particular. After all I own them. Now I'm not saying the 18-70 is an ideal lens or ignoring the fact that primes are better performers open or maybe exibit less distortion, or in this case are smalller and lighter. Nor do I want anyone to forget how handy F1.8 can be in available light. I just want to point out that the 18-70 is a hell of a lens for the price. At least if you get a good sample it is.