Thanks to all for the feedback,
I will keep working with the lens and see if I can get a better feel. I did forgot to mention, most of the problem shots were taken with the lens at almost full
shift, and this might have caused underexposure. All of the exposures were in the 1/30 or faster shutter speed, but I will go back and check to see what the
noise reduction setting were.
Sincerely
Paul Caldwell