Friendly suggestion MD.

Try placing a rack of antlers under a tree in the shadows and then check them as the sun goes down. Brown antlers in the shadows are the issue that really matters, at least where and what I hunt, and is a slightly different issue of perception than black and white resolution. Would be interesting to see if there is any difference between that and the B&W chart.

Also, your Gack book is very enjoyable. Lots of interesting tidbits. Well named, and well done.