Thanks, Enola.  This is much what I thought.  I am experimenting with a shorter fl lens which will give an effevtive crop of about 50mm on my Nikon.  If aberration is not a problem, either in barrel or color, I will likely get the lens.  I like the field of view of the effective 50mm crop with my camera.

So, I try simple tests on the "correctness" of the lens and try to determine what is really seen and what is not.... oh my.   Well, this is part of the fun of  photography.           TomDart