Suitable abstract images are all around us, if you know what to look for. One of the most suitable opportunities is the wear and tear caused by time on metal surfaces. Here is an example from our recent Shanghai trip, a metal door that has objectively seen better days - but that now gives us a beautiful abstract image.
Camera: Canon IXUS 170 handheld
Aperture: f/3.6
Focal length: 4.5 mm
Exposure time: 1/30
ISO speed: 250
Post-processing: Picasa 3.0
