I took these shots with the camera on a tripod, under window light. I made the crop by opening the two shots up in Photoshop and laying them side by side at 100%. Then I used the Grab utility to take a TIF file, and then opened that in Photoshop and saved for Web.
As you can see, I turned the crop 90° so I could show it as large as possible.
There is obvious smearing and loss of detail at ISO800, but there is not much loss, if any, of color or vibrancy.
Full Frame at ISO100
Full Frame at ISO800
CROP (Upper shot at ISO100 and the lower one at ISO800)
