KK: I'll try to shoot a few things with the 28-105 S1 this afternoon and maybe post the results. I haven't used the MD mount one in a while, and I haven't used the NAI at all yet, so I'll give that one a try. Thanks for the input on the 19-35AF. That's about what I thought and I should be happy enough with it. Any idea who makes them for Vivitar? Cosina?
The 19-35AF lenses are made by Cosina and Samyang.