This week we were to experiment with the fstop, which affects the depth of field. "Smaller the fstop, the larger the depth of field". So I tried lining up these shot glasses to do my homework. Got mixed results, I liked the light and reflection, but don't feel I got the crisp focus I wanted. Possibly because the room was too dark? Just not sure. All I know is I wanted to take a shot out of each of those glasses by the time I finished!