Mark, I went out this afternoon and took some pictures of a headstone to see what differences there are with lens, distance, so forth. I used a 27-105, 50-150, and a 200-300( these are digital equivalents, in the lenses themselves are marked as 17-70, 35-105, and 100-200. Took them back and put on the computer and it seems like that around the 100-200 digital length in all the lenses seemed a little better. I also noticed that with the 17-70 lens( 27-107 digital) the color seemed a little more bright. I also could see the difference in getting down level or shooting up a little as opposed to shooting down at the stone. So don't know if that will help when people take pictures of the monuments. It was blowing rather hard, so am going back out later and experiment in shooting in manual mode so I can over and underexpose some shots to see how that works out. I guess I probably have automatic bracketing on my camera, but have never tried it yet. I use a Sony A-100 and have a couple of old Minolta AF lenses that work with it, plus the 17-70 that came with it.
Bill