Exercise: Measuring exposures f/5.6 -2 stops

having a break outside pub-2, a photo by caroline..collins on Flickr.

Going down 2 stops makes this image a little too dark, I wondered if the stone might show up better if the image was a litle lower in exposure but it dosen't seem to make an improvement. Also the man taking a break seems to have more shadow around him making him less noticible.