OK, here's a cut & paste from
my Amazon.com Discussions thread on the same topic:
OK, here we go. I went ahead and pulled out (almost) all the stops. This is a large file (~65Mb) that I kept at full resolution. I've color-balanced it as well, but no sharpening, straightening, etc. Converted from NEF to TIFF with no steps in between (other than color balance and cropping). I tried to make sure the light was centered over the two devices, and that I was focused on the center. This picture does a good job of representing what I see sitting in my chair under my reading light. It's clear to me here that the K3 is the winner (but it's not by as noticeable a margin as I'd originally thought). Is this perhaps all due to the PW light always being on?
https://dl.dropbox.com/u/1421633/PWvK3.tif"