Nice, but I hope you earthed that foil.
Originally Posted by jp498
http://www.flickr.com/photos/1375969...7635019029286/ is the photos for one I described a build of on LFF. Someone else refined that and made an even nicer box. Do check out LFF DIY forum when it's back up.
A metal halide light will also work, but not as fast or compact.
Pinhole >> http://www.flickr.com/photos/isisfor...7622458540973/