This photograph focuses on hanging tree branches in the foreground while blurring out the tree and street lighting in the background. The image is underexposed and too dark, losing detail in the foreground branches due to insufficient lighting conditions without flash.

1. Focus.
Depth of Field Under/Over Exposure
Depth of Field can be either where
a photograph focuses on either
the background or the foreground.
The photograph that I have taken,
focuses on the foreground, the
hanging branches. I have blurred
out of focus the tree and street
lighting behind it.
Under and over Exposure covers
where a photograph is taken in
either too dark or too light a
setting. The flash on a camera can
also affect these factors. My image
above is under exposed, it is too
dark and you loose a lot of the
detailing in the foreground.