A small poster advertises a survey on back pain. It’s a 3 year programme and since this was taken in 2007 it’s nearing completion now!
Taken somewhere in San Francisco.
| Aperture | ƒ/4 |
| Camera | Canon EOS 20D |
| Focal length | 10mm |
| ISO | 100 |
| Shutter speed | 1/160s |
The evolution of back pain
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