The aim of this exercise is to explore the relationship between aperture and focus, or depth of field.
Plan: The previous exercise was indoors with vodka minatures. As I would be stopping the lens down in this exercise I decided that outside would be best otherwise I would need quite long exposures or a flash. Using flash would set a continuous speed and therefore would not demonstrate the relationship between speed and aperture.
Results and reality: My first set of images were of some railings on a bridge but the difference in the images was not that great; visible on inspection but not obvious when small and posted on a blog. I don't have a fast lens (yet) so the best way to create the desired effect was to use the zoom from a distance with a max aperture of F6.3. I then went into the garden and put some pegs on the washing line at regular intervals and kept them the same colour to avoid distraction.
With a combination of focal length and aperture you can isolate or accentuate any part of an image to attract the viewer's eye. Importantly you are actually isolating a plain. Looking at the results, the red lines show areas at the bottom right that are in focus so I have not just isolated the pegs but also areas of the washing line that are on the same plain, which was not the desired result.