Check out these Aluminium Shutters images:
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Image by steevithak
Pear tree and Pontiac
These were shot with a Canon 40D using aluminium foil over the lens mount. I poked a hole with a pin near what I hoped might be the center and started shooting. I cranked the ISO up to about 1200 and was able to use shutter speeds around 1/6 of sec.
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Image by steevithak
Red berries, close up
These were shot with a Canon 40D using aluminium foil over the lens mount. I poked a hole with a pin near what I hoped might be the center and started shooting. I cranked the ISO up to about 1200 and was able to use shutter speeds around 1/6 of sec.