UPDATE #2:

Well, I got my first set of Provia transparencies back from my Tuesday night shoot at the Wegman exhibit, and I must say I'm very surprised. Remember, these images were all made with my like-new Windsor #151 (exact Diana clone). It was the first time I used it.

The transaprencies were shockingly sharp! Amazing that with a plastic lens, shooting handheld inside a gallery at bulb setting, and the images are sharp. What gives? No real vignetting to speak of, no real distorted edges/soft quality that I expected.

Did I get the plastic camera that has a perfect lens???