I really enjoyed this depth of field assignment because the aperture made such a huge difference in the overall focus.  I started out with shooting down a long fence.  There were some flowers in the foreground and a large plant in the back ground.  When I had the aperture set on f5 (which was the lowest I could go) the front was very clear and the back was very blurry but with f22 everything was in fairly good focus.  However, when I focused on the back plant with the aperture at f22 the whole photo was very crisp and sharp. 

The same thing happened with the two objects situated 6 inches and 10 to 15 feet only it was easier to see.  I think it’s interesting that everything is in better focus with f22 when I set the focus to the back object.  This was really apparent when the objects were 3 inches and 25ft with f22.

           f_5 front focus                               f_5  back focus                           f_22  back focus                              f_22 front focus

       f_22 front focus 6in 25ft               f_22 back focus 1ft 10ft                 f_3.5 back focus 6in 25ft               f_3.5 front focus 1ft, 10ft