I just realized something. The chart I used is a microscope resolution chart. I read through a few tutorials on testing camera resolution, and this just happened to be the first camera resolution tutorial that had a working link for a printable chart. It has 21 groups of lines marked between 1 and 10. All my lenses fell in between 5.6 and 6.3 or about 6 (coorelating with 6 mega pixels)? The chart is just a little down in this tutorial.
Testing Camera Lenses - Sharpness, Chromatic Aberration and Distortion - Bob Atkins Photography
I printed on a canon mp530 (office type printer but with the same print engine as the ip4300 photo printer with 9600x2400 dpi). It recommended 15x22 inch print size but I used 8.5x11 on illford smooth gloss at best settings (just an informal comparison of lenses so I figured it might be good enough). To the eye, its good to at least 8 on the chart (9 seems ok, can not tell about 10, maybe my eyes are 9 megapixel, lol).
I framed on the sides of the chart so the resolution is being tested about half way out from the center (that just happened to be the part of the frame where that resolution laid on the print).
I didn't stop the lenses down at all (I wasn't sure where to set it and since I normally use these lenses wide open that's where I tested). After the fact, I thought that stopping it down might help eliminate focus issues with the higher depth of field but didn't have time (had to put the lenses up as the kids were coming home). I just now took a couple shots with the ricoh (yes its a rikenon and so far seems to be better than any other lens I have including several AF lenses). I stopped it down to f8 (seemed to eliminate any possible focus issues), and I got the same results again.
I might have to try with the image offset so that the 5.6-6.3 groups fall on the edge of the frame (next time the kids are out). I really suspect that the camera is the limiting factor but it might be interesting to see if any of the lesser lenses are worse towards the edge.
On the field of view and crop factor thing, the way my mind is seeing it now, is that a 50mm lens see's a 50mm angle of view period. A full frame camera would have a larger image (and therefor might be perceived as having a different fov but in reality, the angle is the same, it is just taking a larger section out of the image compared to a smaller sensor). Is that about right?