If you own a digital SLR camera and are getting comfortable with daylight shooting, then the next natural progression is capturing the night. Find inspiration from several beautiful examples of night photos, plus 10 simple-to-follow tips you can use today to get a firm grasp on night photography.
Depth of Field: The pictures above change the aperture setting of the camera lenses, creating a sense of depth in their images. The larger the apertures (smaller F-stop number) and closer the focusing distances, the shallower depth of field is. Other example of Shallow Depth of Field: http://digital-photography-school.com/17-beautiful-images-with-shallow-depth-of-field