Watch Long Exposure Shots Develop Before Your Eyes with Magic Shutter
Cameras usually hide what it’s shooting from you when the sensor is capturing light, so you can’t watch slow shutter speed photographs as they’re being shot. Magic Shutter is an app for the iPhone that shoots these long exposure using the camera’s video feed, which allows you to see the photograph as its being “developed” on the screen.
Due to limitations Apple places on video resolution, this app currently only spits out low res images (though an update with 1MP photos is coming soon). If you want to play with it you can find it for $3 in the iTunes store.