I should maybe do an "extreme" version. Have it start with 10 quality=1 JPEGs against 10 PNGs, then do 10 quality=2... etc. I notice that "8 out of 10" is about typical. I bet the quality=10 and higher images are the tough ones. My next experiment, if I can figure out how to control the variables, is "is camera RAW sharper"? mjr.